SHIFTIEST is a playable word

shifty Scrabble® Dictionary

adjective
shiftier, shiftiest
tricky
(adverb) shiftily
116 Playable Words can be made from "SHIFTIEST"
   2-Letter Words (14 found)
   3-Letter Words (28 found)
   7-Letter Words (1 found)
   8-Letter Words (2 found)
   9-Letter Words (2 found)