diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index 87db1a7f1defbda8c25c568d0e4ccb3df7172749..ba963c440ad67a371388c9e29f7820c2d33f114e 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -90,6 +90,7 @@ dict_custom = {
     "dihedral",
     "discoverability",
     "discretization",
+    "discretizes",
     "downcasting",
     "durations",
     "eachother",
@@ -143,6 +144,7 @@ dict_custom = {
     "occluders",
     "optionals",
     "orthogonalize",
+    "orthonormalize",
     "orthonormalized",
     "overridable",
     "paddings",