GRUELER is a playable word

grueler Scrabble® Dictionary

noun
pl. gruelers
one that gruels
40 Playable Words can be made from "GRUELER"
   2-Letter Words (3 found)
   3-Letter Words (16 found)
   4-Letter Words (12 found)
   5-Letter Words (7 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)