diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index fb22c58d9306fb59bab9d575bebc40c0f0b06469..31135b2f578950de7ec50478a8651c690251f8c2 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -223,6 +223,7 @@ dict_custom = {
     "rasterizing",
     "reallocations",
     "rebalancing",
+    "rebase",
     "recomputation",
     "recurse",
     "recursed",
@@ -262,6 +263,8 @@ dict_custom = {
     "subdirectories",
     "subdirectory",
     "symmetrize",
+    "symmetrized",
+    "targetless",
     "teleporting",
     "templating",
     "tertiarily",
@@ -300,6 +303,8 @@ dict_custom = {
     "unlinkable",
     "unlinked",
     "unlinking",
+    "unmap",
+    "unmapped",
     "unmatching",
     "unmaximized",
     "unnormalized",
@@ -316,6 +321,7 @@ dict_custom = {
     "untag",
     "untagging",
     "untrusted",
+    "untyped",
     "unusably",
     "unvisited",
     "userless",