CRASSER is a playable word

crass Scrabble® Dictionary

adjective
crasser, crassest
grossly vulgar or stupid
(adverb) crassly
81 Playable Words can be made from "CRASSER"
   2-Letter Words (6 found)
   3-Letter Words (19 found)
   6-Letter Words (10 found)
   7-Letter Words (2 found)