HISSIEST is a playable word

hissy Scrabble® Dictionary

adjective
hissier, hissiest
characterized by a hissing sound
noun
pl. hissies
a tantrum
63 Playable Words can be made from "HISSIEST"
   2-Letter Words (11 found)
   3-Letter Words (18 found)
   4-Letter Words (17 found)
   5-Letter Words (9 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)