MUUMUUS is a playable word

muumuu Scrabble® Dictionary

noun
pl. muumuus
a long, loose dress
14 Playable Words can be made from "MUUMUUS"
   2-Letter Words (4 found)
   3-Letter Words (5 found)
   4-Letter Words (2 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)