COCKBILL is a playable word

cockbill Scrabble® Dictionary

verb
cockbilled, cockbilling, cockbills
to raise the yardarm on a ship
40 Playable Words can be made from "COCKBILL"
   2-Letter Words (7 found)
   3-Letter Words (13 found)
   4-Letter Words (13 found)
   5-Letter Words (6 found)
   8-Letter Words (1 found)