COGNOMEN is a playable word

cognomen Scrabble® Dictionary

noun
pl. cognomens or cognomina
a family name
62 Playable Words can be made from "COGNOMEN"
   2-Letter Words (10 found)
   3-Letter Words (23 found)
   4-Letter Words (15 found)
   5-Letter Words (8 found)
   6-Letter Words (5 found)
   8-Letter Words (1 found)