diff --git a/doc/src/Errors_messages.txt b/doc/src/Errors_messages.txt
index fb5003e602..4504cbeb11 100644
--- a/doc/src/Errors_messages.txt
+++ b/doc/src/Errors_messages.txt
@@ -7448,6 +7448,11 @@ The Atoms section of a data file must come before a Triangles section. :dd
 The Atoms section of a data file must come before a Velocities
 section. :dd
 
+{Must re-specify non-restarted pair style (xxx) after read_restart} :dt
+
+For pair styles, that do not store their settings in a restart file,
+it must be defined with a new 'pair_style' command after read_restart. :dd
+
 {Must set both respa inner and outer} :dt
 
 Cannot use just the inner or outer option with respa without using the
@@ -10049,19 +10054,19 @@ create_box command. :dd
 A universe or uloop style variable must specify a number of values >= to the
 number of processor partitions. :dd
 
-{Unknown angle style} :dt
+{Unrecognized angle style} :dt
 
 The choice of angle style is unknown. :dd
 
-{Unknown atom style} :dt
+{Unrecognized atom style} :dt
 
 The choice of atom style is unknown. :dd
 
-{Unknown body style} :dt
+{Unrecognized body style} :dt
 
 The choice of body style is unknown. :dd
 
-{Unknown bond style} :dt
+{Unrecognized bond style} :dt
 
 The choice of bond style is unknown. :dd
 
@@ -10077,23 +10082,23 @@ Self-explanatory. :dd
 
 Self-explanatory. :dd
 
-{Unknown command: %s} :dt
+{Unrecognized command: %s} :dt
 
 The command is not known to LAMMPS.  Check the input script. :dd
 
-{Unknown compute style} :dt
+{Unrecognized compute style} :dt
 
 The choice of compute style is unknown. :dd
 
-{Unknown dihedral style} :dt
+{Unrecognized dihedral style} :dt
 
 The choice of dihedral style is unknown. :dd
 
-{Unknown dump reader style} :dt
+{Unrecognized dump reader style} :dt
 
 The choice of dump reader style via the format keyword is unknown. :dd
 
-{Unknown dump style} :dt
+{Unrecognized dump style} :dt
 
 The choice of dump style is unknown. :dd
 
@@ -10101,7 +10106,7 @@ The choice of dump style is unknown. :dd
 
 Self-explanatory. :dd
 
-{Unknown fix style} :dt
+{Unrecognized fix style} :dt
 
 The choice of fix style is unknown. :dd
 
@@ -10109,7 +10114,7 @@ The choice of fix style is unknown. :dd
 
 A section of the data file cannot be read by LAMMPS. :dd
 
-{Unknown improper style} :dt
+{Unrecognized improper style} :dt
 
 The choice of improper style is unknown. :dd
 
@@ -10117,7 +10122,7 @@ The choice of improper style is unknown. :dd
 
 One or more specified keywords are not recognized. :dd
 
-{Unknown kspace style} :dt
+{Unrecognized kspace style} :dt
 
 The choice of kspace style is unknown. :dd
 
@@ -10133,7 +10138,7 @@ Self-explanatory. :dd
 
 Self-explanatory. :dd
 
-{Unknown pair style} :dt
+{Unrecognized pair style} :dt
 
 The choice of pair style is unknown. :dd
 
@@ -10141,7 +10146,7 @@ The choice of pair style is unknown. :dd
 
 The choice of sub-style is unknown. :dd
 
-{Unknown region style} :dt
+{Unrecognized region style} :dt
 
 The choice of region style is unknown. :dd
 
diff --git a/src/atom.h b/src/atom.h
index b2a657cf1a..ff7bd0c538 100644
--- a/src/atom.h
+++ b/src/atom.h
@@ -361,7 +361,7 @@ E: Atom IDs must be used for molecular systems
 
 Atom IDs are used to identify and find partner atoms in bonds.
 
-E: Unknown atom style
+E: Unrecognized atom style
 
 The choice of atom style is unknown.
 
diff --git a/src/atom_vec_body.h b/src/atom_vec_body.h
index 7cc052b6c5..4d02c4b3e0 100644
--- a/src/atom_vec_body.h
+++ b/src/atom_vec_body.h
@@ -130,7 +130,7 @@ E: Invalid atom_style body command
 
 No body style argument was provided.
 
-E: Unknown body style
+E: Unrecognized body style
 
 The choice of body style is unknown.
 
diff --git a/src/domain.h b/src/domain.h
index 9ebdd6ae94..e131d07a1b 100644
--- a/src/domain.h
+++ b/src/domain.h
@@ -269,7 +269,7 @@ E: Reuse of region ID
 
 A region ID cannot be used twice.
 
-E: Unknown region style
+E: Unrecognized region style
 
 The choice of region style is unknown.
 
diff --git a/src/force.h b/src/force.h
index e4bb0f990e..2b4298d049 100644
--- a/src/force.h
+++ b/src/force.h
@@ -159,35 +159,36 @@ class Force : protected Pointers {
 
 E: Must re-specify non-restarted pair style (%s) after read_restart
 
-UNDOCUMENTED
+For pair styles, that do not store their settings in a restart file,
+it must be defined with a new 'pair_style' command after read_restart.
 
-E: Unknown pair style %s
+E: Unrecognized pair style %s
 
-UNDOCUMENTED
+The choice of pair style is unknown.
 
-E: Unknown bond style %s
+E: Unrecognized bond style %s
 
-UNDOCUMENTED
+The choice of bond style is unknown.
 
-E: Unknown angle style %s
+E: Unrecognized angle style %s
 
-UNDOCUMENTED
+The choice of angle style is unknown.
 
-E: Unknown dihedral style %s
+E: Unrecognized dihedral style %s
 
-UNDOCUMENTED
+The choice of dihedral style is unknown.
 
-E: Unknown improper style %s
+E: Unrecognized improper style %s
 
-UNDOCUMENTED
+The choice of improper style is unknown.
 
 E: Cannot yet use KSpace solver with grid with comm style tiled
 
 This is current restriction in LAMMPS.
 
-E: Unknown kspace style %s
+E: Unrecognized kspace style %s
 
-UNDOCUMENTED
+The choice of kspace style is unknown.
 
 E: Illegal ... command
 
diff --git a/src/modify.h b/src/modify.h
index eca4e07859..537ff81543 100644
--- a/src/modify.h
+++ b/src/modify.h
@@ -224,9 +224,9 @@ The ID and style of a fix match for a fix you are changing with a fix
 command, but the new group you are specifying does not match the old
 group.
 
-E: Unknown fix style %s
+E: Unrecognized fix style %s
 
-UNDOCUMENTED
+The choice of fix style is unknown.
 
 E: Could not find fix_modify ID
 
@@ -240,9 +240,9 @@ E: Reuse of compute ID
 
 A compute ID cannot be used twice.
 
-E: Unknown compute style %s
+E: Unrecognized compute style %s
 
-UNDOCUMENTED
+The choice of compute style is unknown.
 
 E: Could not find compute_modify ID
 
diff --git a/src/output.h b/src/output.h
index 5354759343..1bf4128ee0 100644
--- a/src/output.h
+++ b/src/output.h
@@ -152,7 +152,7 @@ E: Invalid dump frequency
 
 Dump frequency must be 1 or greater.
 
-E: Unknown dump style
+E: Unrecognized dump style
 
 The choice of dump style is unknown.
 
diff --git a/src/read_dump.h b/src/read_dump.h
index de174c3df6..3ee13f779c 100644
--- a/src/read_dump.h
+++ b/src/read_dump.h
@@ -134,7 +134,7 @@ E: Dump file does not contain requested snapshot
 
 Self-explanatory.
 
-E: Unknown dump reader style
+E: Unrecognized dump reader style
 
 The choice of dump reader style via the format keyword is unknown.
 
diff --git a/src/write_dump.h b/src/write_dump.h
index 18fff6345b..db39a75d4b 100644
--- a/src/write_dump.h
+++ b/src/write_dump.h
@@ -43,7 +43,7 @@ Self-explanatory.  Check the input script syntax and compare to the
 documentation for the command.  You can use -echo screen as a
 command-line option when running LAMMPS to see the offending line.
 
-E: Unknown dump style
+E: Unrecognized dump style
 
 The choice of dump style is unknown.