UNFITS is a playable word

unfit Scrabble® Dictionary

verb
unfitted, unfitting, unfits
to make unsuitable
48 Playable Words can be made from "UNFITS"
   2-Letter Words (10 found)
   3-Letter Words (19 found)
   4-Letter Words (15 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)