BRAINIER is a playable word

brainy Scrabble® Dictionary

adjective
brainier, brainiest
smart
90 Playable Words can be made from "BRAINIER"
   2-Letter Words (14 found)
   3-Letter Words (29 found)
   5-Letter Words (11 found)
   6-Letter Words (4 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)