diff --git a/src/DPD-REACT/npair_half_bin_newton_ssa.h b/src/DPD-REACT/npair_half_bin_newton_ssa.h
index 52f3bb5142..265087e7ed 100644
--- a/src/DPD-REACT/npair_half_bin_newton_ssa.h
+++ b/src/DPD-REACT/npair_half_bin_newton_ssa.h
@@ -41,8 +41,8 @@ class NPairHalfBinNewtonSSA : public NPair {
   int ssa_maxPhaseLen;
 
   NPairHalfBinNewtonSSA(class LAMMPS *);
-  ~NPairHalfBinNewtonSSA();
-  void build(class NeighList *);
+  ~NPairHalfBinNewtonSSA() override;
+  void build(class NeighList *) override;
 
  private:
   int ssa_maxPhaseCt;
diff --git a/src/INTEL/npair_full_bin_ghost_intel.h b/src/INTEL/npair_full_bin_ghost_intel.h
index 3830b07e6d..a14ac18909 100644
--- a/src/INTEL/npair_full_bin_ghost_intel.h
+++ b/src/INTEL/npair_full_bin_ghost_intel.h
@@ -35,8 +35,7 @@ namespace LAMMPS_NS {
 class NPairFullBinGhostIntel : public NPairIntel {
  public:
   NPairFullBinGhostIntel(class LAMMPS *);
-  ~NPairFullBinGhostIntel() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
  private:
   template <class flt_t, class acc_t>
diff --git a/src/INTEL/npair_full_bin_intel.h b/src/INTEL/npair_full_bin_intel.h
index 720780898c..ce23b0d475 100644
--- a/src/INTEL/npair_full_bin_intel.h
+++ b/src/INTEL/npair_full_bin_intel.h
@@ -32,8 +32,7 @@ namespace LAMMPS_NS {
 class NPairFullBinIntel : public NPairIntel {
  public:
   NPairFullBinIntel(class LAMMPS *);
-  ~NPairFullBinIntel() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
  private:
   template <class flt_t, class acc_t> void fbi(NeighList *, IntelBuffers<flt_t, acc_t> *);
diff --git a/src/INTEL/npair_half_bin_newton_intel.h b/src/INTEL/npair_half_bin_newton_intel.h
index 9c9dcab703..3830847954 100644
--- a/src/INTEL/npair_half_bin_newton_intel.h
+++ b/src/INTEL/npair_half_bin_newton_intel.h
@@ -31,8 +31,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtonIntel : public NPairIntel {
  public:
   NPairHalfBinNewtonIntel(class LAMMPS *);
-  ~NPairHalfBinNewtonIntel() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
  private:
   template <class flt_t, class acc_t> void hbni(NeighList *, IntelBuffers<flt_t, acc_t> *);
diff --git a/src/INTEL/npair_half_bin_newton_tri_intel.h b/src/INTEL/npair_half_bin_newton_tri_intel.h
index 0d6f577b3d..e6e3c6ce16 100644
--- a/src/INTEL/npair_half_bin_newton_tri_intel.h
+++ b/src/INTEL/npair_half_bin_newton_tri_intel.h
@@ -31,8 +31,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtonTriIntel : public NPairIntel {
  public:
   NPairHalfBinNewtonTriIntel(class LAMMPS *);
-  ~NPairHalfBinNewtonTriIntel() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
  private:
   template <class flt_t, class acc_t> void hbnti(NeighList *, IntelBuffers<flt_t, acc_t> *);
diff --git a/src/INTEL/npair_halffull_newton_intel.h b/src/INTEL/npair_halffull_newton_intel.h
index ea751c2421..7514adbe25 100644
--- a/src/INTEL/npair_halffull_newton_intel.h
+++ b/src/INTEL/npair_halffull_newton_intel.h
@@ -45,8 +45,7 @@ namespace LAMMPS_NS {
 class NPairHalffullNewtonIntel : public NPair {
  public:
   NPairHalffullNewtonIntel(class LAMMPS *);
-  ~NPairHalffullNewtonIntel() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
  protected:
   FixIntel *_fix;
diff --git a/src/INTEL/npair_intel.h b/src/INTEL/npair_intel.h
index 8035f6f9be..a17733aed7 100644
--- a/src/INTEL/npair_intel.h
+++ b/src/INTEL/npair_intel.h
@@ -76,8 +76,8 @@ namespace LAMMPS_NS {
 class NPairIntel : public NPair {
  public:
   NPairIntel(class LAMMPS *);
-  ~NPairIntel();
-  virtual void copy_neighbor_info();
+  ~NPairIntel() override;
+  void copy_neighbor_info() override;
 
   #ifdef _LMP_INTEL_OFFLOAD
   void grow_stencil();
diff --git a/src/INTEL/npair_skip_intel.h b/src/INTEL/npair_skip_intel.h
index 2c77b24cd5..b7ca847eee 100644
--- a/src/INTEL/npair_skip_intel.h
+++ b/src/INTEL/npair_skip_intel.h
@@ -43,9 +43,9 @@ namespace LAMMPS_NS {
 class NPairSkipIntel : public NPair {
  public:
   NPairSkipIntel(class LAMMPS *);
-  ~NPairSkipIntel();
-  virtual void copy_neighbor_info();
-  void build(class NeighList *);
+  ~NPairSkipIntel() override;
+  void copy_neighbor_info() override;
+  void build(class NeighList *) override;
 
  protected:
   FixIntel *_fix;
diff --git a/src/KOKKOS/npair_copy_kokkos.h b/src/KOKKOS/npair_copy_kokkos.h
index b272275650..af8e1962d8 100644
--- a/src/KOKKOS/npair_copy_kokkos.h
+++ b/src/KOKKOS/npair_copy_kokkos.h
@@ -35,8 +35,7 @@ template<class DeviceType>
 class NPairCopyKokkos : public NPair {
  public:
   NPairCopyKokkos(class LAMMPS *);
-  ~NPairCopyKokkos() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
  private:
   void copy_to_kokkos(class NeighList *);
   void copy_to_cpu(class NeighList *);
diff --git a/src/KOKKOS/npair_halffull_kokkos.h b/src/KOKKOS/npair_halffull_kokkos.h
index f6b1fbf08e..2bd3daf365 100644
--- a/src/KOKKOS/npair_halffull_kokkos.h
+++ b/src/KOKKOS/npair_halffull_kokkos.h
@@ -139,8 +139,7 @@ class NPairHalffullKokkos : public NPair {
   typedef ArrayTypes<DeviceType> AT;
 
   NPairHalffullKokkos(class LAMMPS *);
-  ~NPairHalffullKokkos() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
   KOKKOS_INLINE_FUNCTION
   void operator()(TagNPairHalffullCompute, const int&) const;
diff --git a/src/KOKKOS/npair_kokkos.h b/src/KOKKOS/npair_kokkos.h
index 339d7e425d..e78a0f6a85 100644
--- a/src/KOKKOS/npair_kokkos.h
+++ b/src/KOKKOS/npair_kokkos.h
@@ -100,11 +100,10 @@ class NPairKokkos : public NPair {
 
  public:
   NPairKokkos(class LAMMPS *);
-  ~NPairKokkos() {}
-  void copy_neighbor_info();
-  void copy_bin_info();
-  void copy_stencil_info();
-  void build(class NeighList *);
+  void copy_neighbor_info() override;
+  void copy_bin_info() override;
+  void copy_stencil_info() override;
+  void build(class NeighList *) override;
 
  private:
   int newton_pair;
diff --git a/src/KOKKOS/npair_skip_kokkos.h b/src/KOKKOS/npair_skip_kokkos.h
index 2024a1e214..695641a8d6 100644
--- a/src/KOKKOS/npair_skip_kokkos.h
+++ b/src/KOKKOS/npair_skip_kokkos.h
@@ -63,8 +63,7 @@ class NPairSkipKokkos : public NPair {
   typedef ArrayTypes<DeviceType> AT;
 
   NPairSkipKokkos(class LAMMPS *);
-  ~NPairSkipKokkos() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 
   KOKKOS_INLINE_FUNCTION
   void operator()(TagNPairSkipCompute, const int&, int&, const bool&) const;
diff --git a/src/KOKKOS/npair_ssa_kokkos.h b/src/KOKKOS/npair_ssa_kokkos.h
index ed99f54e1e..4b17ae881a 100644
--- a/src/KOKKOS/npair_ssa_kokkos.h
+++ b/src/KOKKOS/npair_ssa_kokkos.h
@@ -59,11 +59,10 @@ class NPairSSAKokkos : public NPair {
   typename AT::t_int_2d ssa_gitemLen;
 
   NPairSSAKokkos(class LAMMPS *);
-  ~NPairSSAKokkos() {}
-  void copy_neighbor_info();
-  void copy_bin_info();
-  void copy_stencil_info();
-  void build(class NeighList *);
+  void copy_neighbor_info() override;
+  void copy_bin_info() override;
+  void copy_stencil_info() override;
+  void build(class NeighList *) override;
  private:
   // data from Neighbor class
 
diff --git a/src/OPENMP/npair_full_bin_atomonly_omp.h b/src/OPENMP/npair_full_bin_atomonly_omp.h
index 2cdc5d086d..0b17edd6ec 100644
--- a/src/OPENMP/npair_full_bin_atomonly_omp.h
+++ b/src/OPENMP/npair_full_bin_atomonly_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBinAtomonlyOmp : public NPair {
  public:
   NPairFullBinAtomonlyOmp(class LAMMPS *);
-  ~NPairFullBinAtomonlyOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_bin_ghost_omp.h b/src/OPENMP/npair_full_bin_ghost_omp.h
index 0483cf7575..e53b4f6a8e 100644
--- a/src/OPENMP/npair_full_bin_ghost_omp.h
+++ b/src/OPENMP/npair_full_bin_ghost_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBinGhostOmp : public NPair {
  public:
   NPairFullBinGhostOmp(class LAMMPS *);
-  ~NPairFullBinGhostOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_bin_omp.h b/src/OPENMP/npair_full_bin_omp.h
index f701556950..1ce8a70e13 100644
--- a/src/OPENMP/npair_full_bin_omp.h
+++ b/src/OPENMP/npair_full_bin_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBinOmp : public NPair {
  public:
   NPairFullBinOmp(class LAMMPS *);
-  ~NPairFullBinOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_multi_old_omp.h b/src/OPENMP/npair_full_multi_old_omp.h
index 0b28db12d6..e8430623e1 100644
--- a/src/OPENMP/npair_full_multi_old_omp.h
+++ b/src/OPENMP/npair_full_multi_old_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullMultiOldOmp : public NPair {
  public:
   NPairFullMultiOldOmp(class LAMMPS *);
-  ~NPairFullMultiOldOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_multi_omp.h b/src/OPENMP/npair_full_multi_omp.h
index 8ee3cadbc8..9d0067703f 100644
--- a/src/OPENMP/npair_full_multi_omp.h
+++ b/src/OPENMP/npair_full_multi_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullMultiOmp : public NPair {
  public:
   NPairFullMultiOmp(class LAMMPS *);
-  ~NPairFullMultiOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_nsq_ghost_omp.h b/src/OPENMP/npair_full_nsq_ghost_omp.h
index b34d1fb74d..c19f7c5a0a 100644
--- a/src/OPENMP/npair_full_nsq_ghost_omp.h
+++ b/src/OPENMP/npair_full_nsq_ghost_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullNsqGhostOmp : public NPair {
  public:
   NPairFullNsqGhostOmp(class LAMMPS *);
-  ~NPairFullNsqGhostOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_full_nsq_omp.h b/src/OPENMP/npair_full_nsq_omp.h
index e16f830e97..bb0849e8a6 100644
--- a/src/OPENMP/npair_full_nsq_omp.h
+++ b/src/OPENMP/npair_full_nsq_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullNsqOmp : public NPair {
  public:
   NPairFullNsqOmp(class LAMMPS *);
-  ~NPairFullNsqOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_bin_atomonly_newton_omp.h b/src/OPENMP/npair_half_bin_atomonly_newton_omp.h
index 9ebf5c6f65..42d92b6e16 100644
--- a/src/OPENMP/npair_half_bin_atomonly_newton_omp.h
+++ b/src/OPENMP/npair_half_bin_atomonly_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinAtomonlyNewtonOmp : public NPair {
  public:
   NPairHalfBinAtomonlyNewtonOmp(class LAMMPS *);
-  ~NPairHalfBinAtomonlyNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_bin_newtoff_ghost_omp.h b/src/OPENMP/npair_half_bin_newtoff_ghost_omp.h
index 2c94ff83f3..319fac9b35 100644
--- a/src/OPENMP/npair_half_bin_newtoff_ghost_omp.h
+++ b/src/OPENMP/npair_half_bin_newtoff_ghost_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtoffGhostOmp : public NPair {
  public:
   NPairHalfBinNewtoffGhostOmp(class LAMMPS *);
-  ~NPairHalfBinNewtoffGhostOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_bin_newtoff_omp.h b/src/OPENMP/npair_half_bin_newtoff_omp.h
index 849766e803..83dd355b2a 100644
--- a/src/OPENMP/npair_half_bin_newtoff_omp.h
+++ b/src/OPENMP/npair_half_bin_newtoff_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtoffOmp : public NPair {
  public:
   NPairHalfBinNewtoffOmp(class LAMMPS *);
-  ~NPairHalfBinNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_bin_newton_omp.h b/src/OPENMP/npair_half_bin_newton_omp.h
index ddbb46b57e..f80df43b22 100644
--- a/src/OPENMP/npair_half_bin_newton_omp.h
+++ b/src/OPENMP/npair_half_bin_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtonOmp : public NPair {
  public:
   NPairHalfBinNewtonOmp(class LAMMPS *);
-  ~NPairHalfBinNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_bin_newton_tri_omp.h b/src/OPENMP/npair_half_bin_newton_tri_omp.h
index 0506b1a561..6b40d6b95f 100644
--- a/src/OPENMP/npair_half_bin_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_bin_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtonTriOmp : public NPair {
  public:
   NPairHalfBinNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfBinNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_newtoff_omp.h b/src/OPENMP/npair_half_multi_newtoff_omp.h
index 1be3c8d0e7..c166c34ce0 100644
--- a/src/OPENMP/npair_half_multi_newtoff_omp.h
+++ b/src/OPENMP/npair_half_multi_newtoff_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewtoffOmp : public NPair {
  public:
   NPairHalfMultiNewtoffOmp(class LAMMPS *);
-  ~NPairHalfMultiNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_newton_omp.h b/src/OPENMP/npair_half_multi_newton_omp.h
index a665f788dc..c1684bb282 100644
--- a/src/OPENMP/npair_half_multi_newton_omp.h
+++ b/src/OPENMP/npair_half_multi_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewtonOmp : public NPair {
  public:
   NPairHalfMultiNewtonOmp(class LAMMPS *);
-  ~NPairHalfMultiNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_newton_tri_omp.h b/src/OPENMP/npair_half_multi_newton_tri_omp.h
index a4cb2245b0..44aed7a09c 100644
--- a/src/OPENMP/npair_half_multi_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_multi_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewtonTriOmp : public NPair {
  public:
   NPairHalfMultiNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfMultiNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_old_newtoff_omp.h b/src/OPENMP/npair_half_multi_old_newtoff_omp.h
index 1ad1f2c91c..7964e53a88 100644
--- a/src/OPENMP/npair_half_multi_old_newtoff_omp.h
+++ b/src/OPENMP/npair_half_multi_old_newtoff_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewtoffOmp : public NPair {
  public:
   NPairHalfMultiOldNewtoffOmp(class LAMMPS *);
-  ~NPairHalfMultiOldNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_old_newton_omp.h b/src/OPENMP/npair_half_multi_old_newton_omp.h
index 66e67ec818..3486712933 100644
--- a/src/OPENMP/npair_half_multi_old_newton_omp.h
+++ b/src/OPENMP/npair_half_multi_old_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewtonOmp : public NPair {
  public:
   NPairHalfMultiOldNewtonOmp(class LAMMPS *);
-  ~NPairHalfMultiOldNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_multi_old_newton_tri_omp.h b/src/OPENMP/npair_half_multi_old_newton_tri_omp.h
index 2147a88ee6..007c936c33 100644
--- a/src/OPENMP/npair_half_multi_old_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_multi_old_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewtonTriOmp : public NPair {
  public:
   NPairHalfMultiOldNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfMultiOldNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_nsq_newtoff_ghost_omp.h b/src/OPENMP/npair_half_nsq_newtoff_ghost_omp.h
index 84e066b618..f3ee492dec 100644
--- a/src/OPENMP/npair_half_nsq_newtoff_ghost_omp.h
+++ b/src/OPENMP/npair_half_nsq_newtoff_ghost_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewtoffGhostOmp : public NPair {
  public:
   NPairHalfNsqNewtoffGhostOmp(class LAMMPS *);
-  ~NPairHalfNsqNewtoffGhostOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_nsq_newtoff_omp.h b/src/OPENMP/npair_half_nsq_newtoff_omp.h
index 68ed500e9f..80b56188f2 100644
--- a/src/OPENMP/npair_half_nsq_newtoff_omp.h
+++ b/src/OPENMP/npair_half_nsq_newtoff_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewtoffOmp : public NPair {
  public:
   NPairHalfNsqNewtoffOmp(class LAMMPS *);
-  ~NPairHalfNsqNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_nsq_newton_omp.h b/src/OPENMP/npair_half_nsq_newton_omp.h
index 94575915d2..5905af9b26 100644
--- a/src/OPENMP/npair_half_nsq_newton_omp.h
+++ b/src/OPENMP/npair_half_nsq_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewtonOmp : public NPair {
  public:
   NPairHalfNsqNewtonOmp(class LAMMPS *);
-  ~NPairHalfNsqNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_respa_bin_newtoff_omp.h b/src/OPENMP/npair_half_respa_bin_newtoff_omp.h
index 1d2a7f31e5..c9fae76f58 100644
--- a/src/OPENMP/npair_half_respa_bin_newtoff_omp.h
+++ b/src/OPENMP/npair_half_respa_bin_newtoff_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewtoffOmp : public NPair {
  public:
   NPairHalfRespaBinNewtoffOmp(class LAMMPS *);
-  ~NPairHalfRespaBinNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_respa_bin_newton_omp.h b/src/OPENMP/npair_half_respa_bin_newton_omp.h
index f6e30722f0..56c6b3bf1e 100644
--- a/src/OPENMP/npair_half_respa_bin_newton_omp.h
+++ b/src/OPENMP/npair_half_respa_bin_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewtonOmp : public NPair {
  public:
   NPairHalfRespaBinNewtonOmp(class LAMMPS *);
-  ~NPairHalfRespaBinNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_respa_bin_newton_tri_omp.h b/src/OPENMP/npair_half_respa_bin_newton_tri_omp.h
index f1a4d16b21..e43a9ecddc 100644
--- a/src/OPENMP/npair_half_respa_bin_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_respa_bin_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewtonTriOmp : public NPair {
  public:
   NPairHalfRespaBinNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfRespaBinNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_respa_nsq_newtoff_omp.h b/src/OPENMP/npair_half_respa_nsq_newtoff_omp.h
index 7c9a3cc8d2..4d1b524b7c 100644
--- a/src/OPENMP/npair_half_respa_nsq_newtoff_omp.h
+++ b/src/OPENMP/npair_half_respa_nsq_newtoff_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaNsqNewtoffOmp : public NPair {
  public:
   NPairHalfRespaNsqNewtoffOmp(class LAMMPS *);
-  ~NPairHalfRespaNsqNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_respa_nsq_newton_omp.h b/src/OPENMP/npair_half_respa_nsq_newton_omp.h
index 7adda81885..b9a879c134 100644
--- a/src/OPENMP/npair_half_respa_nsq_newton_omp.h
+++ b/src/OPENMP/npair_half_respa_nsq_newton_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaNsqNewtonOmp : public NPair {
  public:
   NPairHalfRespaNsqNewtonOmp(class LAMMPS *);
-  ~NPairHalfRespaNsqNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_bin_newtoff_omp.h b/src/OPENMP/npair_half_size_bin_newtoff_omp.h
index 728a435ffe..ac226a798a 100644
--- a/src/OPENMP/npair_half_size_bin_newtoff_omp.h
+++ b/src/OPENMP/npair_half_size_bin_newtoff_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewtoffOmp : public NPair {
  public:
   NPairHalfSizeBinNewtoffOmp(class LAMMPS *);
-  ~NPairHalfSizeBinNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_bin_newton_omp.h b/src/OPENMP/npair_half_size_bin_newton_omp.h
index 0902f0f417..03143e3353 100644
--- a/src/OPENMP/npair_half_size_bin_newton_omp.h
+++ b/src/OPENMP/npair_half_size_bin_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewtonOmp : public NPair {
  public:
   NPairHalfSizeBinNewtonOmp(class LAMMPS *);
-  ~NPairHalfSizeBinNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_bin_newton_tri_omp.h b/src/OPENMP/npair_half_size_bin_newton_tri_omp.h
index 4b1ca9e71b..4924f4d157 100644
--- a/src/OPENMP/npair_half_size_bin_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_size_bin_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewtonTriOmp : public NPair {
  public:
   NPairHalfSizeBinNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfSizeBinNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_newtoff_omp.h b/src/OPENMP/npair_half_size_multi_newtoff_omp.h
index 5865a977ed..29e5945454 100644
--- a/src/OPENMP/npair_half_size_multi_newtoff_omp.h
+++ b/src/OPENMP/npair_half_size_multi_newtoff_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewtoffOmp : public NPair {
  public:
   NPairHalfSizeMultiNewtoffOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_newton_omp.h b/src/OPENMP/npair_half_size_multi_newton_omp.h
index 3f9e76adbf..e3200d094e 100644
--- a/src/OPENMP/npair_half_size_multi_newton_omp.h
+++ b/src/OPENMP/npair_half_size_multi_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewtonOmp : public NPair {
  public:
   NPairHalfSizeMultiNewtonOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_newton_tri_omp.h b/src/OPENMP/npair_half_size_multi_newton_tri_omp.h
index fa0b2ead6c..8eee91e055 100644
--- a/src/OPENMP/npair_half_size_multi_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_size_multi_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewtonTriOmp : public NPair {
  public:
   NPairHalfSizeMultiNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_old_newtoff_omp.h b/src/OPENMP/npair_half_size_multi_old_newtoff_omp.h
index fa61e86b92..2ace70c519 100644
--- a/src/OPENMP/npair_half_size_multi_old_newtoff_omp.h
+++ b/src/OPENMP/npair_half_size_multi_old_newtoff_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewtoffOmp : public NPair {
  public:
   NPairHalfSizeMultiOldNewtoffOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_old_newton_omp.h b/src/OPENMP/npair_half_size_multi_old_newton_omp.h
index c406e3524e..b6df50980c 100644
--- a/src/OPENMP/npair_half_size_multi_old_newton_omp.h
+++ b/src/OPENMP/npair_half_size_multi_old_newton_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewtonOmp : public NPair {
  public:
   NPairHalfSizeMultiOldNewtonOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_multi_old_newton_tri_omp.h b/src/OPENMP/npair_half_size_multi_old_newton_tri_omp.h
index 37156c7a43..e9635de08a 100644
--- a/src/OPENMP/npair_half_size_multi_old_newton_tri_omp.h
+++ b/src/OPENMP/npair_half_size_multi_old_newton_tri_omp.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewtonTriOmp : public NPair {
  public:
   NPairHalfSizeMultiOldNewtonTriOmp(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewtonTriOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_nsq_newtoff_omp.h b/src/OPENMP/npair_half_size_nsq_newtoff_omp.h
index 2d3c21aa73..bc6f2ebf8c 100644
--- a/src/OPENMP/npair_half_size_nsq_newtoff_omp.h
+++ b/src/OPENMP/npair_half_size_nsq_newtoff_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeNsqNewtoffOmp : public NPair {
  public:
   NPairHalfSizeNsqNewtoffOmp(class LAMMPS *);
-  ~NPairHalfSizeNsqNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_half_size_nsq_newton_omp.h b/src/OPENMP/npair_half_size_nsq_newton_omp.h
index bb7eb3e071..19b16afc30 100644
--- a/src/OPENMP/npair_half_size_nsq_newton_omp.h
+++ b/src/OPENMP/npair_half_size_nsq_newton_omp.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeNsqNewtonOmp : public NPair {
  public:
   NPairHalfSizeNsqNewtonOmp(class LAMMPS *);
-  ~NPairHalfSizeNsqNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_halffull_newtoff_omp.h b/src/OPENMP/npair_halffull_newtoff_omp.h
index 8cd7b64004..272fb8f570 100644
--- a/src/OPENMP/npair_halffull_newtoff_omp.h
+++ b/src/OPENMP/npair_halffull_newtoff_omp.h
@@ -35,8 +35,7 @@ namespace LAMMPS_NS {
 class NPairHalffullNewtoffOmp : public NPair {
  public:
   NPairHalffullNewtoffOmp(class LAMMPS *);
-  ~NPairHalffullNewtoffOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/OPENMP/npair_halffull_newton_omp.h b/src/OPENMP/npair_halffull_newton_omp.h
index 78ca839a43..bd54ec03fe 100644
--- a/src/OPENMP/npair_halffull_newton_omp.h
+++ b/src/OPENMP/npair_halffull_newton_omp.h
@@ -35,8 +35,7 @@ namespace LAMMPS_NS {
 class NPairHalffullNewtonOmp : public NPair {
  public:
   NPairHalffullNewtonOmp(class LAMMPS *);
-  ~NPairHalffullNewtonOmp() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair.h b/src/npair.h
index 35e08786ef..bd14dc3b24 100644
--- a/src/npair.h
+++ b/src/npair.h
@@ -28,7 +28,7 @@ class NPair : protected Pointers {
   double cutoff_custom;    // cutoff set by requestor
 
   NPair(class LAMMPS *);
-  virtual ~NPair();
+  ~NPair() override;
   void post_constructor(class NeighRequest *);
   virtual void copy_neighbor_info();
   void build_setup();
diff --git a/src/npair_copy.h b/src/npair_copy.h
index d21b6610bd..36b80f83d9 100644
--- a/src/npair_copy.h
+++ b/src/npair_copy.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairCopy : public NPair {
  public:
   NPairCopy(class LAMMPS *);
-  ~NPairCopy() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_bin.h b/src/npair_full_bin.h
index 7bc1c11fa9..4d40763271 100644
--- a/src/npair_full_bin.h
+++ b/src/npair_full_bin.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBin : public NPair {
  public:
   NPairFullBin(class LAMMPS *);
-  ~NPairFullBin() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_bin_atomonly.h b/src/npair_full_bin_atomonly.h
index a348f4f734..8e3f96e59b 100644
--- a/src/npair_full_bin_atomonly.h
+++ b/src/npair_full_bin_atomonly.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBinAtomonly : public NPair {
  public:
   NPairFullBinAtomonly(class LAMMPS *);
-  ~NPairFullBinAtomonly() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_bin_ghost.h b/src/npair_full_bin_ghost.h
index 215ee75703..4b7e08a0e1 100644
--- a/src/npair_full_bin_ghost.h
+++ b/src/npair_full_bin_ghost.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullBinGhost : public NPair {
  public:
   NPairFullBinGhost(class LAMMPS *);
-  ~NPairFullBinGhost() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_multi.h b/src/npair_full_multi.h
index 4a1aa09fa1..dcd1b5d8a9 100644
--- a/src/npair_full_multi.h
+++ b/src/npair_full_multi.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairFullMulti : public NPair {
  public:
   NPairFullMulti(class LAMMPS *);
-  ~NPairFullMulti() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_multi_old.h b/src/npair_full_multi_old.h
index cd94eb9c9f..0dd825fcce 100644
--- a/src/npair_full_multi_old.h
+++ b/src/npair_full_multi_old.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairFullMultiOld : public NPair {
  public:
   NPairFullMultiOld(class LAMMPS *);
-  ~NPairFullMultiOld() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_nsq.h b/src/npair_full_nsq.h
index a3fdc498f1..0e65fcd027 100644
--- a/src/npair_full_nsq.h
+++ b/src/npair_full_nsq.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairFullNsq : public NPair {
  public:
   NPairFullNsq(class LAMMPS *);
-  ~NPairFullNsq() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_full_nsq_ghost.h b/src/npair_full_nsq_ghost.h
index 5b5e86fe9f..6ae517ccf7 100644
--- a/src/npair_full_nsq_ghost.h
+++ b/src/npair_full_nsq_ghost.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairFullNsqGhost : public NPair {
  public:
   NPairFullNsqGhost(class LAMMPS *);
-  ~NPairFullNsqGhost() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_bin_atomonly_newton.h b/src/npair_half_bin_atomonly_newton.h
index 68c51ebcdb..7a3eaf34bc 100644
--- a/src/npair_half_bin_atomonly_newton.h
+++ b/src/npair_half_bin_atomonly_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinAtomonlyNewton : public NPair {
  public:
   NPairHalfBinAtomonlyNewton(class LAMMPS *);
-  ~NPairHalfBinAtomonlyNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_bin_newtoff.h b/src/npair_half_bin_newtoff.h
index fd1b9d6cdf..db240f8bd9 100644
--- a/src/npair_half_bin_newtoff.h
+++ b/src/npair_half_bin_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtoff : public NPair {
  public:
   NPairHalfBinNewtoff(class LAMMPS *);
-  ~NPairHalfBinNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_bin_newtoff_ghost.h b/src/npair_half_bin_newtoff_ghost.h
index 1abc3e0c0a..b11e0f4802 100644
--- a/src/npair_half_bin_newtoff_ghost.h
+++ b/src/npair_half_bin_newtoff_ghost.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtoffGhost : public NPair {
  public:
   NPairHalfBinNewtoffGhost(class LAMMPS *);
-  ~NPairHalfBinNewtoffGhost() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_bin_newton.h b/src/npair_half_bin_newton.h
index 7849aa741f..19f7b93ae4 100644
--- a/src/npair_half_bin_newton.h
+++ b/src/npair_half_bin_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewton : public NPair {
  public:
   NPairHalfBinNewton(class LAMMPS *);
-  ~NPairHalfBinNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_bin_newton_tri.h b/src/npair_half_bin_newton_tri.h
index d90cf41023..ad270ae173 100644
--- a/src/npair_half_bin_newton_tri.h
+++ b/src/npair_half_bin_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfBinNewtonTri : public NPair {
  public:
   NPairHalfBinNewtonTri(class LAMMPS *);
-  ~NPairHalfBinNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_newtoff.h b/src/npair_half_multi_newtoff.h
index 4837108667..3142587da6 100644
--- a/src/npair_half_multi_newtoff.h
+++ b/src/npair_half_multi_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewtoff : public NPair {
  public:
   NPairHalfMultiNewtoff(class LAMMPS *);
-  ~NPairHalfMultiNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_newton.h b/src/npair_half_multi_newton.h
index 15cf6ee9c8..55439eacca 100644
--- a/src/npair_half_multi_newton.h
+++ b/src/npair_half_multi_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewton : public NPair {
  public:
   NPairHalfMultiNewton(class LAMMPS *);
-  ~NPairHalfMultiNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_newton_tri.h b/src/npair_half_multi_newton_tri.h
index 4c4f920718..2b6d69f332 100644
--- a/src/npair_half_multi_newton_tri.h
+++ b/src/npair_half_multi_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiNewtonTri : public NPair {
  public:
   NPairHalfMultiNewtonTri(class LAMMPS *);
-  ~NPairHalfMultiNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_old_newtoff.h b/src/npair_half_multi_old_newtoff.h
index 97d6a7ea69..9418cf5a4c 100644
--- a/src/npair_half_multi_old_newtoff.h
+++ b/src/npair_half_multi_old_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewtoff : public NPair {
  public:
   NPairHalfMultiOldNewtoff(class LAMMPS *);
-  ~NPairHalfMultiOldNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_old_newton.h b/src/npair_half_multi_old_newton.h
index c689aea70b..5c84b8ef98 100644
--- a/src/npair_half_multi_old_newton.h
+++ b/src/npair_half_multi_old_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewton : public NPair {
  public:
   NPairHalfMultiOldNewton(class LAMMPS *);
-  ~NPairHalfMultiOldNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_multi_old_newton_tri.h b/src/npair_half_multi_old_newton_tri.h
index 6fc2c49f11..016746cf12 100644
--- a/src/npair_half_multi_old_newton_tri.h
+++ b/src/npair_half_multi_old_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfMultiOldNewtonTri : public NPair {
  public:
   NPairHalfMultiOldNewtonTri(class LAMMPS *);
-  ~NPairHalfMultiOldNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_nsq_newtoff.h b/src/npair_half_nsq_newtoff.h
index 26a50c2f11..45bef5b0b0 100644
--- a/src/npair_half_nsq_newtoff.h
+++ b/src/npair_half_nsq_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewtoff : public NPair {
  public:
   NPairHalfNsqNewtoff(class LAMMPS *);
-  ~NPairHalfNsqNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_nsq_newtoff_ghost.h b/src/npair_half_nsq_newtoff_ghost.h
index 034b452540..5d6cb69450 100644
--- a/src/npair_half_nsq_newtoff_ghost.h
+++ b/src/npair_half_nsq_newtoff_ghost.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewtoffGhost : public NPair {
  public:
   NPairHalfNsqNewtoffGhost(class LAMMPS *);
-  ~NPairHalfNsqNewtoffGhost() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_nsq_newton.h b/src/npair_half_nsq_newton.h
index 11170cec18..6b7ec89b82 100644
--- a/src/npair_half_nsq_newton.h
+++ b/src/npair_half_nsq_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfNsqNewton : public NPair {
  public:
   NPairHalfNsqNewton(class LAMMPS *);
-  ~NPairHalfNsqNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_respa_bin_newtoff.h b/src/npair_half_respa_bin_newtoff.h
index 7c8f592645..2782ae239e 100644
--- a/src/npair_half_respa_bin_newtoff.h
+++ b/src/npair_half_respa_bin_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewtoff : public NPair {
  public:
   NPairHalfRespaBinNewtoff(class LAMMPS *);
-  ~NPairHalfRespaBinNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_respa_bin_newton.h b/src/npair_half_respa_bin_newton.h
index 5483e946a1..c83ca89891 100644
--- a/src/npair_half_respa_bin_newton.h
+++ b/src/npair_half_respa_bin_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewton : public NPair {
  public:
   NPairHalfRespaBinNewton(class LAMMPS *);
-  ~NPairHalfRespaBinNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_respa_bin_newton_tri.h b/src/npair_half_respa_bin_newton_tri.h
index a45e89dff1..a5b573103c 100644
--- a/src/npair_half_respa_bin_newton_tri.h
+++ b/src/npair_half_respa_bin_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaBinNewtonTri : public NPair {
  public:
   NPairHalfRespaBinNewtonTri(class LAMMPS *);
-  ~NPairHalfRespaBinNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_respa_nsq_newtoff.h b/src/npair_half_respa_nsq_newtoff.h
index 5bdd0f0abe..d13fb810da 100644
--- a/src/npair_half_respa_nsq_newtoff.h
+++ b/src/npair_half_respa_nsq_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaNsqNewtoff : public NPair {
  public:
   NPairHalfRespaNsqNewtoff(class LAMMPS *);
-  ~NPairHalfRespaNsqNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_respa_nsq_newton.h b/src/npair_half_respa_nsq_newton.h
index bfa27fbfef..9050ca0fde 100644
--- a/src/npair_half_respa_nsq_newton.h
+++ b/src/npair_half_respa_nsq_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfRespaNsqNewton : public NPair {
  public:
   NPairHalfRespaNsqNewton(class LAMMPS *);
-  ~NPairHalfRespaNsqNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_bin_newtoff.h b/src/npair_half_size_bin_newtoff.h
index 6f2cb2424c..f1f9b2a34b 100644
--- a/src/npair_half_size_bin_newtoff.h
+++ b/src/npair_half_size_bin_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewtoff : public NPair {
  public:
   NPairHalfSizeBinNewtoff(class LAMMPS *);
-  ~NPairHalfSizeBinNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_bin_newton.h b/src/npair_half_size_bin_newton.h
index 8023361a29..a592969c46 100644
--- a/src/npair_half_size_bin_newton.h
+++ b/src/npair_half_size_bin_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewton : public NPair {
  public:
   NPairHalfSizeBinNewton(class LAMMPS *);
-  ~NPairHalfSizeBinNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_bin_newton_tri.h b/src/npair_half_size_bin_newton_tri.h
index 86ce3a2b7d..50861d560e 100644
--- a/src/npair_half_size_bin_newton_tri.h
+++ b/src/npair_half_size_bin_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeBinNewtonTri : public NPair {
  public:
   NPairHalfSizeBinNewtonTri(class LAMMPS *);
-  ~NPairHalfSizeBinNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_newtoff.h b/src/npair_half_size_multi_newtoff.h
index ccb395b24b..b33634e5be 100644
--- a/src/npair_half_size_multi_newtoff.h
+++ b/src/npair_half_size_multi_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewtoff : public NPair {
  public:
   NPairHalfSizeMultiNewtoff(class LAMMPS *);
-  ~NPairHalfSizeMultiNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_newton.h b/src/npair_half_size_multi_newton.h
index 4584dd9f62..32139136e6 100644
--- a/src/npair_half_size_multi_newton.h
+++ b/src/npair_half_size_multi_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewton : public NPair {
  public:
   NPairHalfSizeMultiNewton(class LAMMPS *);
-  ~NPairHalfSizeMultiNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_newton_tri.h b/src/npair_half_size_multi_newton_tri.h
index 789c4c3dac..10e7a90d16 100644
--- a/src/npair_half_size_multi_newton_tri.h
+++ b/src/npair_half_size_multi_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiNewtonTri : public NPair {
  public:
   NPairHalfSizeMultiNewtonTri(class LAMMPS *);
-  ~NPairHalfSizeMultiNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_old_newtoff.h b/src/npair_half_size_multi_old_newtoff.h
index 743ef3225d..c2ca814129 100644
--- a/src/npair_half_size_multi_old_newtoff.h
+++ b/src/npair_half_size_multi_old_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewtoff : public NPair {
  public:
   NPairHalfSizeMultiOldNewtoff(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_old_newton.h b/src/npair_half_size_multi_old_newton.h
index 749275814e..2322b5bc42 100644
--- a/src/npair_half_size_multi_old_newton.h
+++ b/src/npair_half_size_multi_old_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewton : public NPair {
  public:
   NPairHalfSizeMultiOldNewton(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_multi_old_newton_tri.h b/src/npair_half_size_multi_old_newton_tri.h
index e4099e655f..1658abc717 100644
--- a/src/npair_half_size_multi_old_newton_tri.h
+++ b/src/npair_half_size_multi_old_newton_tri.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeMultiOldNewtonTri : public NPair {
  public:
   NPairHalfSizeMultiOldNewtonTri(class LAMMPS *);
-  ~NPairHalfSizeMultiOldNewtonTri() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_nsq_newtoff.h b/src/npair_half_size_nsq_newtoff.h
index dbfdadd5a8..b263a907ed 100644
--- a/src/npair_half_size_nsq_newtoff.h
+++ b/src/npair_half_size_nsq_newtoff.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeNsqNewtoff : public NPair {
  public:
   NPairHalfSizeNsqNewtoff(class LAMMPS *);
-  ~NPairHalfSizeNsqNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_half_size_nsq_newton.h b/src/npair_half_size_nsq_newton.h
index f3e6e7cdf8..17735ccc45 100644
--- a/src/npair_half_size_nsq_newton.h
+++ b/src/npair_half_size_nsq_newton.h
@@ -29,8 +29,7 @@ namespace LAMMPS_NS {
 class NPairHalfSizeNsqNewton : public NPair {
  public:
   NPairHalfSizeNsqNewton(class LAMMPS *);
-  ~NPairHalfSizeNsqNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_halffull_newtoff.h b/src/npair_halffull_newtoff.h
index 7662ee42fc..0a00267449 100644
--- a/src/npair_halffull_newtoff.h
+++ b/src/npair_halffull_newtoff.h
@@ -45,8 +45,7 @@ namespace LAMMPS_NS {
 class NPairHalffullNewtoff : public NPair {
  public:
   NPairHalffullNewtoff(class LAMMPS *);
-  ~NPairHalffullNewtoff() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_halffull_newton.h b/src/npair_halffull_newton.h
index 0dfe220972..95cc09ec0b 100644
--- a/src/npair_halffull_newton.h
+++ b/src/npair_halffull_newton.h
@@ -35,8 +35,7 @@ namespace LAMMPS_NS {
 class NPairHalffullNewton : public NPair {
  public:
   NPairHalffullNewton(class LAMMPS *);
-  ~NPairHalffullNewton() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_skip.h b/src/npair_skip.h
index 5827d8a856..aa2b14e12a 100644
--- a/src/npair_skip.h
+++ b/src/npair_skip.h
@@ -37,8 +37,7 @@ namespace LAMMPS_NS {
 class NPairSkip : public NPair {
  public:
   NPairSkip(class LAMMPS *);
-  ~NPairSkip() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_skip_respa.h b/src/npair_skip_respa.h
index 64b3f7c7da..b0938287b5 100644
--- a/src/npair_skip_respa.h
+++ b/src/npair_skip_respa.h
@@ -31,8 +31,7 @@ namespace LAMMPS_NS {
 class NPairSkipRespa : public NPair {
  public:
   NPairSkipRespa(class LAMMPS *);
-  ~NPairSkipRespa() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_skip_size.h b/src/npair_skip_size.h
index 0864b568a1..df8d479185 100644
--- a/src/npair_skip_size.h
+++ b/src/npair_skip_size.h
@@ -30,8 +30,7 @@ namespace LAMMPS_NS {
 class NPairSkipSize : public NPair {
  public:
   NPairSkipSize(class LAMMPS *);
-  ~NPairSkipSize() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_skip_size_off2on.h b/src/npair_skip_size_off2on.h
index a0205a3865..39aee76b09 100644
--- a/src/npair_skip_size_off2on.h
+++ b/src/npair_skip_size_off2on.h
@@ -31,8 +31,7 @@ namespace LAMMPS_NS {
 class NPairSkipSizeOff2on : public NPair {
  public:
   NPairSkipSizeOff2on(class LAMMPS *);
-  ~NPairSkipSizeOff2on() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/npair_skip_size_off2on_oneside.h b/src/npair_skip_size_off2on_oneside.h
index 2c3ec6f4ca..3f1cd6ef34 100644
--- a/src/npair_skip_size_off2on_oneside.h
+++ b/src/npair_skip_size_off2on_oneside.h
@@ -31,8 +31,7 @@ namespace LAMMPS_NS {
 class NPairSkipSizeOff2onOneside : public NPair {
  public:
   NPairSkipSizeOff2onOneside(class LAMMPS *);
-  ~NPairSkipSizeOff2onOneside() {}
-  void build(class NeighList *);
+  void build(class NeighList *) override;
 };
 
 }    // namespace LAMMPS_NS