STIFFENS is a playable word

stiffen Scrabble® Dictionary

verb
stiffened, stiffening, stiffens
to make stiff
120 Playable Words can be made from "STIFFENS"
   2-Letter Words (13 found)
   3-Letter Words (29 found)
   6-Letter Words (8 found)
   7-Letter Words (4 found)
   8-Letter Words (1 found)