COSMISTS is a playable word

cosmist Scrabble® Dictionary

noun
pl. cosmists
a supporter of cosmism
78 Playable Words can be made from "COSMISTS"
   2-Letter Words (11 found)
   3-Letter Words (23 found)
   5-Letter Words (12 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)