SLYEST is a playable word

sly Scrabble® Dictionary

adjective
slier, sliest or slyer, slyest
crafty
(adverb) slyly
38 Playable Words can be made from "SLYEST"
   2-Letter Words (5 found)
   3-Letter Words (15 found)
   4-Letter Words (13 found)
   5-Letter Words (3 found)
   6-Letter Words (2 found)