GLUMMEST is a playable word

glum Scrabble® Dictionary

noun
pl. glums
glumness
adjective
glummer, glummest
being in low spirits
(adverb) glumly
119 Playable Words can be made from "GLUMMEST"
   2-Letter Words (11 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)