ANTRUM is a playable word

antrum Scrabble® Dictionary

noun
pl. antrums or antra
a cavity in a bone
51 Playable Words can be made from "ANTRUM"
   2-Letter Words (12 found)
   3-Letter Words (25 found)
   4-Letter Words (12 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)