diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index e5dd661571b26650a7efffb172031a2afa8ff247..efe3e87f1e4c45386b830cb81bff499513c455f0 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -52,6 +52,7 @@ dict_custom = {
     "canonicalized",
     "catadioptric",
     "confusticate", "confusticated",
+    "coplanarity",
     "criterium",
     "customizable",
     "decorrelated",
@@ -87,11 +88,12 @@ dict_custom = {
     "paddings",
     "parameterization",
     "parentless",
+    "passepartout",
     "pixelated", "pixelisation",
     "polytope",
     "postprocessed",
     "precalculate",
-    "precomputed",
+    "precomputed", "precomputing",
     "prefetch", "prefetching",
     "prepend", "prepending",
     "preventively",
@@ -245,7 +247,7 @@ dict_custom = {
     "lacunarity",
     "lossless",
     "lossy",
-    "mipmap", "mipmapping",
+    "mipmap", "mipmaps", "mipmapped", "mipmapping",
     "musgrave",
     "ngon", "ngons",
     "normals",