BUMMER is a playable word

bummer Scrabble® Dictionary

noun
pl. bummers
one that bums
26 Playable Words can be made from "BUMMER"
   2-Letter Words (8 found)
   3-Letter Words (12 found)
   4-Letter Words (3 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)