DULLS is a playable word

dull Scrabble® Dictionary

adjective
duller, dullest
mentally slow
verb
dulled, dulling, dulls
to make less sharp
5 Playable Words can be made from "DULLS"
   2-Letter Words (1 found)
   3-Letter Words (1 found)
   4-Letter Words (2 found)
   5-Letter Words (1 found)