COATTESTING is a playable word

coattest Scrabble® Dictionary

verb
coattested, coattesting, coattests
to attest jointly
690 Playable Words can be made from "COATTESTING"
   2-Letter Words (27 found)
   3-Letter Words (99 found)
   9-Letter Words (5 found)
   11-Letter Words (1 found)