CASTOFFS is a playable word

castoff Scrabble® Dictionary

noun
pl. castoffs
a discarded person or thing
101 Playable Words can be made from "CASTOFFS"
   2-Letter Words (8 found)
   3-Letter Words (23 found)
   6-Letter Words (5 found)
   7-Letter Words (2 found)
   8-Letter Words (2 found)