GRUFF is a playable word

gruff Scrabble® Dictionary

adjective
gruffer, gruffest
low and harsh in speech
verb
gruffed, gruffing, gruffs
to utter in a gruff voice
7 Playable Words can be made from "GRUFF"
   3-Letter Words (3 found)
   4-Letter Words (3 found)
   5-Letter Words (1 found)