CRUELLEST is a playable word

cruel Scrabble® Dictionary

adjective
crueler, cruelest or crueller, cruellest
indifferent to the pain of others
(adverb) cruelly
234 Playable Words can be made from "CRUELLEST"
   2-Letter Words (8 found)
   8-Letter Words (2 found)
   9-Letter Words (1 found)