diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index ba963c440ad67a371388c9e29f7820c2d33f114e..5eb7ab0a24ca6782e8f19a23cef1b03bcf0e7f85 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -33,6 +33,7 @@ dict_custom = {
     # Correct spelling, update the dictionary, here:
     # https://github.com/en-wl/wordlist
     "accessor",
+    "additively",
     "adjoint",
     "adjugate",
     "affectable",
@@ -90,6 +91,7 @@ dict_custom = {
     "dihedral",
     "discoverability",
     "discretization",
+    "discretized",
     "discretizes",
     "downcasting",
     "durations",