tetrahedoren->tetrahedron (#2769)

Author: tkoyama010

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