diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index ef3258188b..78dea000f8 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -37920,6 +37920,9 @@ testng->testing
 testof->test of
 testomony->testimony
 testsing->testing
+tetrahedora->tetrahedra
+tetrahedoren->tetrahedron
+tetrahedorens->tetrahedrons
 tetrahedran->tetrahedron
 tetrahedrans->tetrahedrons
 tetry->retry