COSIER is a playable word

cosy Scrabble® Dictionary

adjective
cosier, cosiest
cozy
verb
cosied, cosying, cosies
to cozy
68 Playable Words can be made from "COSIER"
   2-Letter Words (10 found)
   3-Letter Words (24 found)
   5-Letter Words (10 found)
   6-Letter Words (1 found)