COATTEST is a playable word

coattest Scrabble® Dictionary

verb
coattested, coattesting, coattests
to attest jointly
130 Playable Words can be made from "COATTEST"
   2-Letter Words (11 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)