TWINIEST is a playable word

twiny Scrabble® Dictionary

adjective
twinier, twiniest
resembling twine (a strong string)
116 Playable Words can be made from "TWINIEST"
   2-Letter Words (12 found)
   3-Letter Words (26 found)
   6-Letter Words (5 found)
   7-Letter Words (6 found)
   8-Letter Words (1 found)