GRUEL is a playable word

gruel Scrabble® Dictionary

verb
grueled, grueling, gruels or gruelled, gruelling, gruels
to disable by hard work
21 Playable Words can be made from "GRUEL"
   2-Letter Words (3 found)
   3-Letter Words (9 found)
   4-Letter Words (6 found)
   5-Letter Words (3 found)