IMBITTER is a playable word

imbitter Scrabble® Dictionary

verb
imbittered, imbittering, imbitters
to embitter
68 Playable Words can be made from "IMBITTER"
   2-Letter Words (11 found)
   3-Letter Words (15 found)
   5-Letter Words (12 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)