KNOCKERS is a playable word

knocker Scrabble® Dictionary

noun
pl. knockers
one that knocks
122 Playable Words can be made from "KNOCKERS"
   2-Letter Words (12 found)
   3-Letter Words (30 found)
   6-Letter Words (7 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)