--- WordNet/src/wn.c
+++ WordNet/src/wn.c
@@ -26,6 +26,8 @@ static struct {
     { "-domta", CLASS, ADJ, 4, "Domain Terms" },
     { "-famla", FREQ, ADJ, 5, "Familiarity" },
     { "-grepa", WNGREP, ADJ, 6, "Grep" },
+    { "-nomna", DERIVATION, ADJ, 7, "Derived Forms" },
+    { "-deria", DERIVATION, ADJ, 7, "Derived Forms" },
 
     { "-synsn", HYPERPTR, NOUN, 0, "Synonyms/Hypernyms (Ordered by Estimated Frequency)" },
     { "-antsn", ANTPTR,	NOUN, 2, "Antonyms" },