CUPEL is a playable word

cupel Scrabble® Dictionary

verb
cupeled, cupeling, cupels or cupelled, cupelling, cupels
to refine gold or silver in a cuplike vessel
16 Playable Words can be made from "CUPEL"
   2-Letter Words (3 found)
   3-Letter Words (8 found)
   4-Letter Words (4 found)
   5-Letter Words (1 found)