COCKIEST is a playable word

cocky Scrabble® Dictionary

adjective
cockier, cockiest
arrogantly self-confident
noun
pl. cockies
a cockatoo
108 Playable Words can be made from "COCKIEST"
   2-Letter Words (14 found)
   3-Letter Words (31 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)