COSMOSES is a playable word

cosmos Scrabble® Dictionary

noun
pl. cosmoses
the universe regarded as an orderly system
50 Playable Words can be made from "COSMOSES"
   2-Letter Words (8 found)
   3-Letter Words (16 found)
   4-Letter Words (14 found)
   5-Letter Words (6 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)