CUPPER is a playable word

cupper Scrabble® Dictionary

noun
pl. cuppers
one that performs cupping
29 Playable Words can be made from "CUPPER"
   2-Letter Words (4 found)
   3-Letter Words (15 found)
   4-Letter Words (8 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)