FRANKEST is a playable word

frank Scrabble® Dictionary

adjective
franker, frankest
honest and unreserved in speech
verb
franked, franking, franks
to mark (a piece of mail) for free delivery
277 Playable Words can be made from "FRANKEST"
   2-Letter Words (18 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)