diff --git a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshIO.C b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshIO.C
index ce24d32602..79a571f7f8 100644
--- a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshIO.C
+++ b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshIO.C
@@ -78,7 +78,7 @@ void Foam::conformalVoronoiMesh::timeCheck
 
         memInfo m;
 
-        if (m.valid())
+        if (m.good())
         {
             PrintTable<word, label> memoryTable
             (
diff --git a/applications/utilities/preProcessing/PDR/pdrFields/PDRmeshArrays.C b/applications/utilities/preProcessing/PDR/pdrFields/PDRmeshArrays.C
index d09aa71f19..9908d574a1 100644
--- a/applications/utilities/preProcessing/PDR/pdrFields/PDRmeshArrays.C
+++ b/applications/utilities/preProcessing/PDR/pdrFields/PDRmeshArrays.C
@@ -212,7 +212,7 @@ void Foam::PDRmeshArrays::classify
         {
             const auto& limits = faceLimits[cmpt];
 
-            if (!limits.valid())
+            if (!limits.good())
             {
                 // This should be impossible
                 FatalErrorInFunction
diff --git a/applications/utilities/preProcessing/PDR/pdrFields/obstacles/PDRobstacle.C b/applications/utilities/preProcessing/PDR/pdrFields/obstacles/PDRobstacle.C
index b416c08ed6..c1d369d7cf 100644
--- a/applications/utilities/preProcessing/PDR/pdrFields/obstacles/PDRobstacle.C
+++ b/applications/utilities/preProcessing/PDR/pdrFields/obstacles/PDRobstacle.C
@@ -239,7 +239,7 @@ Foam::volumeType Foam::PDRobstacle::trim(const boundBox& bb)
 {
     volumeType::type vt = volumeType::UNKNOWN;
 
-    if (!bb.valid() || !typeId)
+    if (!bb.good() || !typeId)
     {
         return vt;
     }
diff --git a/applications/utilities/surface/surfaceClean/collapseEdge.C b/applications/utilities/surface/surfaceClean/collapseEdge.C
index 89d0e95fea..126313c8a2 100644
--- a/applications/utilities/surface/surfaceClean/collapseEdge.C
+++ b/applications/utilities/surface/surfaceClean/collapseEdge.C
@@ -68,7 +68,7 @@ static triSurface pack
         f[1] = pointMap[f[1]];
         f[2] = pointMap[f[2]];
 
-        if (f.valid())
+        if (f.good())
         {
             newTriangles[nNewTris++] = f;
         }
diff --git a/applications/utilities/surface/surfaceSubset/surfaceSubset.C b/applications/utilities/surface/surfaceSubset/surfaceSubset.C
index 0f7b60e154..db1acfd3a8 100644
--- a/applications/utilities/surface/surfaceSubset/surfaceSubset.C
+++ b/applications/utilities/surface/surfaceSubset/surfaceSubset.C
@@ -117,7 +117,7 @@ int main(int argc, char *argv[])
         zoneBb.min() = markedZone[0];
         zoneBb.max() = markedZone[1];
 
-        if (!zoneBb.valid())
+        if (!zoneBb.good())
         {
             WarningInFunction
                 << "Defined zone is invalid: " << zoneBb << nl;
@@ -191,7 +191,7 @@ int main(int argc, char *argv[])
     // Faces with centre inside "zone"
     //
 
-    if (zoneBb.valid())
+    if (zoneBb.good())
     {
         Info<< "Using zone " << zoneBb << endl;
 
diff --git a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.C b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.C
index f83e260887..c5ee670639 100644
--- a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.C
+++ b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.C
@@ -94,7 +94,7 @@ Foam::dynamicCodeContext::dynamicCodeContext(const dictionary& dict)
 
 // * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
-bool Foam::dynamicCodeContext::valid() const noexcept
+bool Foam::dynamicCodeContext::good() const noexcept
 {
     return &(dict_.get()) != &(dictionary::null);
 }
diff --git a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.H b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.H
index 105686513b..d1763242e5 100644
--- a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.H
+++ b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCodeContext.H
@@ -119,8 +119,11 @@ public:
 
     // Member Functions
 
-        //- Considered valid if not using dictionary::null as the context
-        bool valid() const noexcept;
+        //- Not using dummy code context (dictionary::null)
+        bool good() const noexcept;
+
+        //- Same as good()
+        bool valid() const noexcept { return good(); }
 
         //- Set code context from a dictionary
         void setCodeContext(const dictionary& dict);
diff --git a/src/OpenFOAM/dimensionSet/dimensionSets.H b/src/OpenFOAM/dimensionSet/dimensionSets.H
index a4f9c63f62..b060738c6a 100644
--- a/src/OpenFOAM/dimensionSet/dimensionSets.H
+++ b/src/OpenFOAM/dimensionSet/dimensionSets.H
@@ -124,10 +124,10 @@ public:
         }
 
         //- Is there a valid inverse of the selected unit
-        bool valid() const noexcept
-        {
-            return valid_;
-        }
+        bool good() const noexcept { return valid_; }
+
+        //- Is there a valid inverse of the selected unit
+        bool valid() const noexcept { return valid_; }
 
         //- (if valid) obtain set of coefficients of unitNames
         void coefficients(scalarField& exponents) const;
diff --git a/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.C b/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.C
index fd2f6828a1..4199fc52ba 100644
--- a/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.C
+++ b/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.C
@@ -40,7 +40,7 @@ Foam::label Foam::coupleGroupIdentifier::findOtherPatchID
 {
     const polyBoundaryMesh& pbm = mesh.boundaryMesh();
 
-    if (!valid())
+    if (!good())
     {
         FatalErrorInFunction
             << "Invalid coupleGroup patch group"
diff --git a/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.H b/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.H
index 9d7bed8ed2..17fbcaaa77 100644
--- a/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.H
+++ b/src/OpenFOAM/meshes/Identifiers/patch/coupleGroupIdentifier.H
@@ -35,8 +35,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef coupleGroupIdentifier_H
-#define coupleGroupIdentifier_H
+#ifndef Foam_coupleGroupIdentifier_H
+#define Foam_coupleGroupIdentifier_H
 
 #include "word.H"
 #include "label.H"
@@ -97,16 +97,13 @@ public:
     // Member Functions
 
         //- Name of patchGroup
-        const word& name() const noexcept
-        {
-            return name_;
-        }
+        const word& name() const noexcept { return name_; }
 
-        //- Is a valid patchGroup (non-empty) name
-        bool valid() const noexcept
-        {
-            return !name_.empty();
-        }
+        //- The patchGroup has a non-empty name
+        bool good() const noexcept { return !name_.empty(); }
+
+        //- The patchGroup has a non-empty name
+        bool valid() const noexcept { return good(); }
 
         //- Find other patch in same region.
         //  \return index of patch or -1.
diff --git a/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.C b/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.C
index 1aac7a93e1..9bee9857e7 100644
--- a/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.C
+++ b/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.C
@@ -426,7 +426,7 @@ void Foam::coordinateSystem::rotation(autoPtr<coordinateRotation>&& crot)
 
 void Foam::coordinateSystem::write(Ostream& os) const
 {
-    if (!valid())
+    if (!good())
     {
         return;
     }
@@ -450,7 +450,7 @@ void Foam::coordinateSystem::writeEntry(Ostream& os) const
 
 void Foam::coordinateSystem::writeEntry(const word& keyword, Ostream& os) const
 {
-    if (!valid())
+    if (!good())
     {
         return;
     }
diff --git a/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.H b/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.H
index c6879c2fde..7703525b1a 100644
--- a/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.H
+++ b/src/OpenFOAM/primitives/coordinate/systems/coordinateSystem.H
@@ -558,17 +558,14 @@ public:
 
     // Characteristics
 
-        //- Consider valid if it has a specification
-        virtual bool valid() const
-        {
-            return bool(spec_);
-        }
+        //- Consider good if it has a specification
+        virtual bool good() const { return bool(spec_); }
 
         //- True if the rotation tensor is uniform for all locations
-        virtual bool uniform() const
-        {
-            return true;
-        }
+        virtual bool uniform() const { return true; }
+
+        //- Same as good() - 2023-07
+        virtual bool valid() const { return this->good(); }
 
 
     // Access
diff --git a/src/OpenFOAM/primitives/coordinate/systems/indirectCS.C b/src/OpenFOAM/primitives/coordinate/systems/indirectCS.C
index 31d5619637..488d6b135d 100644
--- a/src/OpenFOAM/primitives/coordinate/systems/indirectCS.C
+++ b/src/OpenFOAM/primitives/coordinate/systems/indirectCS.C
@@ -100,7 +100,7 @@ void Foam::coordSystem::indirect::writeEntry
     Ostream& os
 ) const
 {
-    if (!valid())
+    if (!good())
     {
         return;
     }
diff --git a/src/OpenFOAM/primitives/coordinate/systems/indirectCS.H b/src/OpenFOAM/primitives/coordinate/systems/indirectCS.H
index afc6b06888..26565d46f2 100644
--- a/src/OpenFOAM/primitives/coordinate/systems/indirectCS.H
+++ b/src/OpenFOAM/primitives/coordinate/systems/indirectCS.H
@@ -161,18 +161,18 @@ public:
 
     // Characteristics
 
-        //- Is coordinate system valid?
-        virtual bool valid() const
-        {
-            return backend_ && backend_->valid();
-        }
+        //- Is coordinate system good/valid?
+        virtual bool good() const { return backend_ && backend_->good(); }
 
         //- True if the rotation tensor is uniform for all positions
         virtual bool uniform() const
         {
-            return backend_->uniform();
+            return !backend_ || backend_->uniform();
         }
 
+        //- Same as good() - 2023-07
+        virtual bool valid() const { return this->good(); }
+
 
     // Access
 
diff --git a/src/OpenFOAM/primitives/tuples/Pair.H b/src/OpenFOAM/primitives/tuples/Pair.H
index 48a8538205..c3845c9951 100644
--- a/src/OpenFOAM/primitives/tuples/Pair.H
+++ b/src/OpenFOAM/primitives/tuples/Pair.H
@@ -132,8 +132,8 @@ public:
 
     // Queries
 
-        //- True if first() is less-than second()
-        inline bool sorted() const;
+        //- True if first() is less-than-equal second()
+        inline bool is_sorted() const;
 
 
     // Editing
@@ -174,6 +174,13 @@ public:
                 }
             }
         };
+
+
+    // Housekeeping
+
+        //- Deprecated(2023-07) Use is_sorted() method
+        //  \deprecated(2023-07) Use is_sorted() method
+        bool sorted() const { return is_sorted(); }
 };
 
 
diff --git a/src/OpenFOAM/primitives/tuples/PairI.H b/src/OpenFOAM/primitives/tuples/PairI.H
index 841bf8c349..70471ac214 100644
--- a/src/OpenFOAM/primitives/tuples/PairI.H
+++ b/src/OpenFOAM/primitives/tuples/PairI.H
@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2017-2020 OpenCFD Ltd.
+    Copyright (C) 2017-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -148,7 +148,7 @@ inline void Foam::Pair<T>::flip()
 
 
 template<class T>
-inline bool Foam::Pair<T>::sorted() const
+inline bool Foam::Pair<T>::is_sorted() const
 {
     return !(second() < first());
 }
diff --git a/src/conversion/ccm/reader/ccmInterfaceDefinitions.H b/src/conversion/ccm/reader/ccmInterfaceDefinitions.H
index fbd87b659f..577eee7025 100644
--- a/src/conversion/ccm/reader/ccmInterfaceDefinitions.H
+++ b/src/conversion/ccm/reader/ccmInterfaceDefinitions.H
@@ -117,11 +117,14 @@ public:
         }
 
         //- True if all internal ids are non-negative
-        bool valid() const
+        bool good() const noexcept
         {
             return (id >= 0 && bnd0 >= 0 && bnd1 >= 0 && bnd0 != bnd1);
         }
 
+        //- Same as good()
+        bool valid() const noexcept { return good(); }
+
 
         //- Canonical name for boundary 0
         word canonicalName0() const
@@ -218,7 +221,7 @@ public:
         //- Add (valid) interface entry
         bool add(const interfaceEntry& entry)
         {
-            return (entry.valid() && map().set(entry.id, entry));
+            return (entry.good() && map().set(entry.id, entry));
         }
 
 
diff --git a/src/fileFormats/gltf/foamGltfSceneWriter.C b/src/fileFormats/gltf/foamGltfSceneWriter.C
index c36161cea3..8fdb27fee6 100644
--- a/src/fileFormats/gltf/foamGltfSceneWriter.C
+++ b/src/fileFormats/gltf/foamGltfSceneWriter.C
@@ -50,7 +50,7 @@ Foam::glTF::sceneWriter::~sceneWriter()
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-bool Foam::glTF::sceneWriter::valid() const noexcept
+bool Foam::glTF::sceneWriter::good() const noexcept
 {
     return (ofile_ && scene_);
 }
diff --git a/src/fileFormats/gltf/foamGltfSceneWriter.H b/src/fileFormats/gltf/foamGltfSceneWriter.H
index 41517a47f0..e1c731139e 100644
--- a/src/fileFormats/gltf/foamGltfSceneWriter.H
+++ b/src/fileFormats/gltf/foamGltfSceneWriter.H
@@ -94,15 +94,15 @@ public:
     // Member Functions
 
         //- True if output file and scene exist
-        bool valid() const noexcept;
+        bool good() const noexcept;
 
-        //- The json file name. Empty with !valid()
+        //- The json file name. Empty with !good()
         const fileName& path() const;
 
-        //- Const access to the scene. Error if valid() is not true!
+        //- Const access to the scene. Error if good() is not true!
         const scene& getScene() const;
 
-        //- Non-const access to the scene. Error if valid() is not true!
+        //- Non-const access to the scene. Error if good() is not true!
         scene& getScene();
 
 
@@ -111,6 +111,9 @@ public:
 
         //- Write scene and close file
         void close();
+
+        //- Same as good()
+        bool valid() const noexcept { return good(); }
 };
 
 
diff --git a/src/fileFormats/stl/STLAsciiParse.H b/src/fileFormats/stl/STLAsciiParse.H
index 5aa2b66186..e585aa498d 100644
--- a/src/fileFormats/stl/STLAsciiParse.H
+++ b/src/fileFormats/stl/STLAsciiParse.H
@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2018 OpenCFD Ltd.
+    Copyright (C) 2018-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -34,8 +34,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef STLAsciiParse_H
-#define STLAsciiParse_H
+#ifndef Foam_STLAsciiParse_H
+#define Foam_STLAsciiParse_H
 
 #include "DynamicList.H"
 #include "HashTable.H"
@@ -122,20 +122,20 @@ public:
         inline void clear();
 
         //- Do all the solid groups appear in order?
-        inline bool sorted() const;
+        bool is_sorted() const noexcept { return sorted_; }
 
         //- A list of unstitched triangle points
-        inline DynamicList<STLpoint>& points();
+        DynamicList<STLpoint>& points() noexcept { return points_; }
 
         //- A list of facet IDs (group IDs)
         //- corresponds to the number of triangles
-        inline DynamicList<label>& facets();
+        DynamicList<label>& facets() noexcept { return facets_; }
 
         //- Solid names in the order of their appearance.
-        inline DynamicList<word>& names();
+        DynamicList<word>& names() noexcept { return names_; }
 
         //- Solid sizes in the order of their appearance.
-        inline DynamicList<label>& sizes();
+        DynamicList<label>& sizes() noexcept { return sizes_; }
 };
 
 
diff --git a/src/fileFormats/stl/STLAsciiParseFlex.L b/src/fileFormats/stl/STLAsciiParseFlex.L
index c954efbd7c..500b41209b 100644
--- a/src/fileFormats/stl/STLAsciiParseFlex.L
+++ b/src/fileFormats/stl/STLAsciiParseFlex.L
@@ -232,7 +232,7 @@ endsolid              {space}("endsolid"|"ENDSOLID")({some_space}{word})*
      normal.x() = strtof(YYText(), &endPtr);
      normal.y() = strtof(endPtr, &endPtr);
      normal.z() = strtof(endPtr, &endPtr);
-     normals_.append(normal);
+     normals_.push_back(normal);
      */
     BEGIN(readFacet);
 }
diff --git a/src/fileFormats/stl/STLAsciiParseI.H b/src/fileFormats/stl/STLAsciiParseI.H
index c20ebf7455..8f4af95f79 100644
--- a/src/fileFormats/stl/STLAsciiParseI.H
+++ b/src/fileFormats/stl/STLAsciiParseI.H
@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2018 OpenCFD Ltd.
+    Copyright (C) 2018-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -48,12 +48,13 @@ inline void Foam::Detail::STLAsciiParse::beginSolid(word solidName)
         groupId_ = sizes_.size();
         if (nameLookup_.insert(solidName, groupId_))
         {
-            names_.append(solidName);
-            sizes_.append(0);
+            names_.push_back(std::move(solidName));
+            sizes_.push_back(0);
         }
         else
         {
-            FatalErrorInFunction<< "Duplicate solid-name: " << solidName
+            FatalErrorInFunction
+                << "Duplicate solid-name: " << solidName << nl
                 << exit(FatalError);
         }
     }
@@ -79,7 +80,7 @@ inline bool Foam::Detail::STLAsciiParse::addVertexComponent(float val)
 
     if (++nVertexCmpt_ == 3)
     {
-        points_.append(currVertex_);
+        points_.push_back(currVertex_);
         nVertexCmpt_ = 0;
         ++nFacetPoints_;
     }
@@ -95,7 +96,7 @@ inline bool Foam::Detail::STLAsciiParse::addVertexComponent(const char* text)
 
     if (++nVertexCmpt_ == 3)
     {
-        points_.append(currVertex_);
+        points_.push_back(currVertex_);
         nVertexCmpt_ = 0;
         ++nFacetPoints_;
     }
@@ -108,8 +109,8 @@ inline void Foam::Detail::STLAsciiParse::endFacet()
 {
     if (nFacetPoints_ == 3)
     {
-        facets_.append(groupId_);
-        sizes_[groupId_]++;
+        facets_.push_back(groupId_);
+        ++sizes_[groupId_];
     }
     else
     {
@@ -161,34 +162,4 @@ inline void Foam::Detail::STLAsciiParse::clear()
 }
 
 
-inline bool Foam::Detail::STLAsciiParse::sorted() const
-{
-    return sorted_;
-}
-
-
-inline Foam::DynamicList<Foam::STLpoint>& Foam::Detail::STLAsciiParse::points()
-{
-    return points_;
-}
-
-
-inline Foam::DynamicList<Foam::label>& Foam::Detail::STLAsciiParse::facets()
-{
-    return facets_;
-}
-
-
-inline Foam::DynamicList<Foam::word>& Foam::Detail::STLAsciiParse::names()
-{
-    return names_;
-}
-
-
-inline Foam::DynamicList<Foam::label>& Foam::Detail::STLAsciiParse::sizes()
-{
-    return sizes_;
-}
-
-
 // ************************************************************************* //
diff --git a/src/fileFormats/stl/STLAsciiParseManual.C b/src/fileFormats/stl/STLAsciiParseManual.C
index b08f23d8df..b23332c3a8 100644
--- a/src/fileFormats/stl/STLAsciiParseManual.C
+++ b/src/fileFormats/stl/STLAsciiParseManual.C
@@ -80,7 +80,7 @@ class STLAsciiParseManual
     typedef std::pair<const char*, const char*> tokenType;
 
     // Tokenized line
-    DynamicList<tokenType, 16> tokens_;
+    DynamicList<tokenType> tokens_;
 
     //- Tokenize
     inline std::string::size_type tokenize(const char *p, const char *pe)
@@ -107,7 +107,7 @@ class STLAsciiParseManual
             {
                 ++p;
             }
-            tokens_.append(tokenType(beg, p));
+            tokens_.emplace_back(beg, p);
 
             // Find next
             while (p < pe && isspace(*p))
@@ -250,7 +250,11 @@ void Foam::Detail::STLAsciiParseManual::execute(std::istream& is)
                         {
                             beginSolid
                             (
-                                word::validate(tokens_[1].first, tokens_[1].second)
+                                word::validate
+                                (
+                                    tokens_[1].first,
+                                    tokens_[1].second
+                                )
                             );
                         }
 
@@ -305,8 +309,8 @@ void Foam::Detail::STLAsciiParseManual::execute(std::istream& is)
                     {
                         if (tokens_.size() > 3)
                         {
-                            // Although tokens are not nul-terminated,
-                            // they are space delimited and thus good enough for atof()
+                            // The tokens are space-delimited and thus okay
+                            // for atof()
                             addVertexComponent(tokens_[1].first);
                             addVertexComponent(tokens_[2].first);
                             addVertexComponent(tokens_[3].first);
diff --git a/src/fileFormats/stl/STLReader.C b/src/fileFormats/stl/STLReader.C
index e0597319eb..cc7289fd2e 100644
--- a/src/fileFormats/stl/STLReader.C
+++ b/src/fileFormats/stl/STLReader.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2016-2020 OpenCFD Ltd.
+    Copyright (C) 2016-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -49,7 +49,7 @@ void Foam::fileFormats::STLReader::transfer
     Detail::STLAsciiParse& parsed
 )
 {
-    sorted_ = parsed.sorted();
+    sorted_ = parsed.is_sorted();
 
     points_.transfer(parsed.points());
     zoneIds_.transfer(parsed.facets());
@@ -143,7 +143,7 @@ bool Foam::fileFormats::STLReader::readBINARY
         {
             zoneI = dynSizes.size();
             lookup.insert(origId, zoneI);
-            dynSizes.append(0);
+            dynSizes.push_back(0);
         }
 
         zoneIds_[facei] = zoneI;
diff --git a/src/fileFormats/stl/STLReader.H b/src/fileFormats/stl/STLReader.H
index 7e88554233..cbd22f9523 100644
--- a/src/fileFormats/stl/STLReader.H
+++ b/src/fileFormats/stl/STLReader.H
@@ -36,8 +36,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef STLReader_H
-#define STLReader_H
+#ifndef Foam_STLReader_H
+#define Foam_STLReader_H
 
 #include "STLCore.H"
 #include "labelledTri.H"
@@ -132,7 +132,7 @@ public:
 
         //- Read from file, filling in the information.
         //  Auto-detect ASCII/BINARY format.
-        STLReader(const fileName& filename);
+        explicit STLReader(const fileName& filename);
 
         //- Read from file, filling in the information.
         //  Manually selected choice of ASCII/BINARY/UNKNOWN(detect) formats.
@@ -158,40 +158,22 @@ public:
         label mergePointsMap(const scalar mergeTol, labelList& pointMap) const;
 
         //- File read was already sorted?
-        inline bool sorted() const
-        {
-            return sorted_;
-        }
+        bool is_sorted() const noexcept { return sorted_; }
 
         //- Return full access to the points
-        inline List<STLpoint>& points()
-        {
-            return points_;
-        }
+        List<STLpoint>& points() noexcept { return points_; }
 
         //- Return full access to the zoneIds
-        inline List<label>& zoneIds()
-        {
-            return zoneIds_;
-        }
+        List<label>& zoneIds() noexcept { return zoneIds_; }
 
         //- The list of solid names in the order of their first appearance
-        inline List<word>& names()
-        {
-            return names_;
-        }
+        List<word>& names() noexcept { return names_; }
 
         //- The list of solid sizes in the order of their first appearance
-        inline List<label>& sizes()
-        {
-            return sizes_;
-        }
+        List<label>& sizes() noexcept { return sizes_; }
 
         //- The STL format used (ASCII or BINARY)
-        inline enum STLFormat stlFormat() const
-        {
-            return format_;
-        }
+        enum STLFormat stlFormat() const noexcept { return format_; }
 };
 
 
diff --git a/src/lumpedPointMotion/interpolation/lumpedPointInterpolator.H b/src/lumpedPointMotion/interpolation/lumpedPointInterpolator.H
index 5da13742fc..ecc9524d09 100644
--- a/src/lumpedPointMotion/interpolation/lumpedPointInterpolator.H
+++ b/src/lumpedPointMotion/interpolation/lumpedPointInterpolator.H
@@ -40,8 +40,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef lumpedPointInterpolator_H
-#define lumpedPointInterpolator_H
+#ifndef Foam_lumpedPointInterpolator_H
+#define Foam_lumpedPointInterpolator_H
 
 #include "Pair.H"
 #include "triFace.H"
@@ -90,19 +90,22 @@ public:
 
     // Access
 
-        //- Valid if there is an associated nearest point
-        inline bool valid() const;
+        //- True if there is an associated nearest point
+        inline bool good() const;
 
-        //- The nearest control point, or -1 if invalid
+        //- Same as good()
+        bool valid() const { return good(); }
+
+        //- The nearest control point, or -1 if !good()
         inline label nearest() const;
 
         //- The first neighbour control point - identical to next1()
         inline label next() const;
 
-        //- The first neighbour control point, or -1 if invalid
+        //- The first neighbour control point, or -1 if !good()
         inline label next1() const;
 
-        //- The second neighbour control point, or -1 if invalid
+        //- The second neighbour control point, or -1 if !good()
         inline label next2() const;
 
         //- The weighting for the nearest point
diff --git a/src/lumpedPointMotion/interpolation/lumpedPointInterpolatorI.H b/src/lumpedPointMotion/interpolation/lumpedPointInterpolatorI.H
index 8556694aa3..da04d422b8 100644
--- a/src/lumpedPointMotion/interpolation/lumpedPointInterpolatorI.H
+++ b/src/lumpedPointMotion/interpolation/lumpedPointInterpolatorI.H
@@ -45,7 +45,7 @@ inline Foam::lumpedPointInterpolator::lumpedPointInterpolator(const label id)
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-inline bool Foam::lumpedPointInterpolator::valid() const
+inline bool Foam::lumpedPointInterpolator::good() const
 {
     return nearest_ != -1;
 }
diff --git a/src/lumpedPointMotion/state/lumpedPointState.H b/src/lumpedPointMotion/state/lumpedPointState.H
index 09b247fe6f..10658a0604 100644
--- a/src/lumpedPointMotion/state/lumpedPointState.H
+++ b/src/lumpedPointMotion/state/lumpedPointState.H
@@ -192,7 +192,7 @@ public:
     // Member Functions
 
         //- Has positions and consistent number of rotations?
-        inline bool valid() const;
+        inline bool good() const;
 
         //- If no points were specified
         inline bool empty() const;
@@ -200,6 +200,9 @@ public:
         //- The number of points
         inline label size() const;
 
+        //- Same as good()
+        bool valid() const { return good(); }
+
         //- The points corresponding to mass centres
         inline const pointField& points() const;
 
diff --git a/src/lumpedPointMotion/state/lumpedPointStateI.H b/src/lumpedPointMotion/state/lumpedPointStateI.H
index ef3cc4a0a0..04c4cad783 100644
--- a/src/lumpedPointMotion/state/lumpedPointStateI.H
+++ b/src/lumpedPointMotion/state/lumpedPointStateI.H
@@ -25,7 +25,7 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-inline bool Foam::lumpedPointState::valid() const
+inline bool Foam::lumpedPointState::good() const
 {
     return points_.size() && points_.size() == angles_.size();
 }
diff --git a/src/mesh/blockMesh/PDRblockMesh/PDRblockBlockMesh.C b/src/mesh/blockMesh/PDRblockMesh/PDRblockBlockMesh.C
index 13f4d8bba5..ae3716a9fb 100644
--- a/src/mesh/blockMesh/PDRblockMesh/PDRblockBlockMesh.C
+++ b/src/mesh/blockMesh/PDRblockMesh/PDRblockBlockMesh.C
@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2020-2021 OpenCFD Ltd.
+    Copyright (C) 2020-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -177,7 +177,7 @@ static Ostream& serializeProjectEdge
 {
     os  << indent << projKeyword << token::SPACE;
 
-    if (e.sorted())
+    if (e.is_sorted())
     {
         os  << e.first() << token::SPACE << e.second();
     }
diff --git a/src/mesh/blockMesh/blockEdges/blockEdge/blockEdge.H b/src/mesh/blockMesh/blockEdges/blockEdge/blockEdge.H
index 1c6a51fb84..c5c1c05110 100644
--- a/src/mesh/blockMesh/blockEdges/blockEdge/blockEdge.H
+++ b/src/mesh/blockMesh/blockEdges/blockEdge/blockEdge.H
@@ -42,8 +42,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef blockEdge_H
-#define blockEdge_H
+#ifndef Foam_blockEdge_H
+#define Foam_blockEdge_H
 
 #include "searchableSurfaces.H"
 #include "edge.H"
@@ -196,7 +196,10 @@ public:
     // Member Functions
 
         //- True if first/last indices are unique and non-negative.
-        inline bool valid() const noexcept;
+        inline bool good() const noexcept;
+
+        //- Same as good()
+        bool valid() const noexcept { return good(); }
 
         //- Index of start (first) point
         inline label start() const noexcept;
diff --git a/src/mesh/blockMesh/blockEdges/blockEdge/blockEdgeI.H b/src/mesh/blockMesh/blockEdges/blockEdge/blockEdgeI.H
index 2f781b8785..b6215be843 100644
--- a/src/mesh/blockMesh/blockEdges/blockEdge/blockEdgeI.H
+++ b/src/mesh/blockMesh/blockEdges/blockEdge/blockEdgeI.H
@@ -28,7 +28,7 @@ License
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-inline bool Foam::blockEdge::valid() const noexcept
+inline bool Foam::blockEdge::good() const noexcept
 {
     return (start_ != end_ && start_ >= 0 && end_ >= 0);
 }
diff --git a/src/mesh/blockMesh/blockMesh/blockMesh.C b/src/mesh/blockMesh/blockMesh/blockMesh.C
index b7826fdd48..da0f958eb5 100644
--- a/src/mesh/blockMesh/blockMesh/blockMesh.C
+++ b/src/mesh/blockMesh/blockMesh/blockMesh.C
@@ -304,7 +304,7 @@ Foam::blockMesh::blockMesh
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-bool Foam::blockMesh::valid() const noexcept
+bool Foam::blockMesh::good() const noexcept
 {
     return bool(topologyPtr_);
 }
diff --git a/src/mesh/blockMesh/blockMesh/blockMesh.H b/src/mesh/blockMesh/blockMesh/blockMesh.H
index c8cb1c1e29..4a5b7b83d7 100644
--- a/src/mesh/blockMesh/blockMesh/blockMesh.H
+++ b/src/mesh/blockMesh/blockMesh/blockMesh.H
@@ -315,7 +315,10 @@ public:
         }
 
         //- True if the blockMesh topology exists
-        bool valid() const noexcept;
+        bool good() const noexcept;
+
+        //- Same as good()
+        bool valid() const noexcept { return good(); }
 
         //- Return the patch names
         wordList patchNames() const;
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
index 89db16bd03..d68f2da2de 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2016-2022 OpenCFD Ltd.
+    Copyright (C) 2016-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -148,7 +148,7 @@ bool Foam::fileFormats::STLsurfaceFormat<Face>::read
     // Generate the (sorted) faces
     List<Face> faceLst(zoneIds.size());
 
-    if (reader.sorted())
+    if (reader.is_sorted())
     {
         // Already sorted - generate directly
         forAll(faceLst, facei)
diff --git a/src/surfMesh/surfaceFormats/tri/TRIReader.H b/src/surfMesh/surfaceFormats/tri/TRIReader.H
index 957aa0fb56..3dc72af62d 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIReader.H
+++ b/src/surfMesh/surfaceFormats/tri/TRIReader.H
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011 OpenFOAM Foundation
-    Copyright (C) 2017-2020 OpenCFD Ltd.
+    Copyright (C) 2017-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -41,8 +41,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef TRIReader_H
-#define TRIReader_H
+#ifndef Foam_TRIReader_H
+#define Foam_TRIReader_H
 
 #include "STLpoint.H"
 #include "labelList.H"
@@ -90,7 +90,7 @@ public:
     // Constructors
 
         //- Read from file, filling in the information
-        TRIReader(const fileName& filename);
+        explicit TRIReader(const fileName& filename);
 
 
     //- Destructor
@@ -112,35 +112,20 @@ public:
         label mergePointsMap(const scalar mergeTol, labelList& pointMap) const;
 
 
-        //- File read was already sorted
-        bool sorted() const
-        {
-            return sorted_;
-        }
+        //- File read was already in sorted order
+        bool is_sorted() const noexcept { return sorted_; }
 
         //- Return full access to the points
-        List<STLpoint>& points()
-        {
-            return points_;
-        }
+        List<STLpoint>& points() noexcept { return points_; }
 
         //- Return full access to the zones
-        List<label>& zoneIds()
-        {
-            return zoneIds_;
-        }
+        List<label>& zoneIds() noexcept { return zoneIds_; }
 
         //- The list of solid names in the order of their first appearance
-        List<word>& names()
-        {
-            return names_;
-        }
+        List<word>& names() noexcept { return names_; }
 
         //- The list of zone sizes in the order of their first appearance
-        List<label>& sizes()
-        {
-            return sizes_;
-        }
+        List<label>& sizes() noexcept { return sizes_; }
 };
 
 
diff --git a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
index 438905ebcd..736671ef7a 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2016-2022 OpenCFD Ltd.
+    Copyright (C) 2016-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -108,7 +108,7 @@ bool Foam::fileFormats::TRIsurfaceFormat<Face>::read
     // Generate the (sorted) faces
     List<Face> faceLst(zoneIds.size());
 
-    if (reader.sorted())
+    if (reader.is_sorted())
     {
         // Already sorted - generate directly
         forAll(faceLst, facei)