ULNAR is a playable word

ulna Scrabble® Dictionary

noun
pl. ulnas or ulnae
a bone of the forearm
(adjective) ulnar
19 Playable Words can be made from "ULNAR"
   2-Letter Words (7 found)
   3-Letter Words (5 found)
   4-Letter Words (5 found)
   5-Letter Words (2 found)