ICIEST is a playable word

icy Scrabble® Dictionary

adjective
icier, iciest
covered with ice
36 Playable Words can be made from "ICIEST"
   2-Letter Words (7 found)
   3-Letter Words (14 found)
   4-Letter Words (10 found)
   5-Letter Words (3 found)
   6-Letter Words (2 found)