CHEERIER is a playable word

cheery Scrabble® Dictionary

adjective
cheerier, cheeriest
cheerful
40 Playable Words can be made from "CHEERIER"
   2-Letter Words (5 found)
   3-Letter Words (13 found)
   4-Letter Words (8 found)
   5-Letter Words (7 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (2 found)