TIGHTEST is a playable word

tight Scrabble® Dictionary

adjective
tighter, tightest
firmly or closely fixed in place
(adverb) tightly
75 Playable Words can be made from "TIGHTEST"
   2-Letter Words (12 found)
   3-Letter Words (25 found)
   5-Letter Words (7 found)
   6-Letter Words (4 found)
   8-Letter Words (1 found)