MUTTERER is a playable word

mutterer Scrabble® Dictionary

noun
pl. mutterers
one that mutters
61 Playable Words can be made from "MUTTERER"
   2-Letter Words (9 found)
   3-Letter Words (17 found)
   4-Letter Words (17 found)
   5-Letter Words (10 found)
   6-Letter Words (5 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)