FOULS is a playable word

foul Scrabble® Dictionary

adjective
fouler, foulest
offensive to the senses
verb
fouled, fouling, fouls
to make foul
14 Playable Words can be made from "FOULS"
   2-Letter Words (5 found)
   3-Letter Words (4 found)
   4-Letter Words (3 found)
   5-Letter Words (2 found)