CRUPPER is a playable word

crupper Scrabble® Dictionary

noun
pl. cruppers
the rump of a horse
37 Playable Words can be made from "CRUPPER"
   2-Letter Words (4 found)
   3-Letter Words (16 found)
   4-Letter Words (11 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)