UNHAPPIEST is a playable word

unhappy Scrabble® Dictionary

adjective
unhappier, unhappiest
561 Playable Words can be made from "UNHAPPIEST"
   2-Letter Words (32 found)
   3-Letter Words (116 found)
   8-Letter Words (6 found)
   9-Letter Words (1 found)
   10-Letter Words (1 found)