OSTOSISES is a playable word

ostosis Scrabble® Dictionary

noun
pl. ostosises or ostoses
the formation of bone
53 Playable Words can be made from "OSTOSISES"
   2-Letter Words (12 found)
   3-Letter Words (17 found)
   4-Letter Words (12 found)
   5-Letter Words (5 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)