COCOON is a playable word

cocoon Scrabble® Dictionary

verb
cocooned, cocooning, cocoons
to wrap or envelop tightly
9 Playable Words can be made from "COCOON"
   2-Letter Words (2 found)
   3-Letter Words (4 found)
   4-Letter Words (2 found)
   6-Letter Words (1 found)