PEACEFULLEST is a playable word

peaceful Scrabble® Dictionary

adjective
peacefuller, peacefullest
undisturbed; calm
615 Playable Words can be made from "PEACEFULLEST"
   2-Letter Words (18 found)
   3-Letter Words (90 found)
   8-Letter Words (7 found)
   9-Letter Words (4 found)
   12-Letter Words (1 found)