STIFFER is a playable word

stiff Scrabble® Dictionary

adjective
stiffer, stiffest
difficult to bend or stretch
verb
stiffed, stiffing, stiffs
to cheat someone by not paying
110 Playable Words can be made from "STIFFER"
   2-Letter Words (12 found)
   3-Letter Words (29 found)
   6-Letter Words (7 found)
   7-Letter Words (1 found)