GREWSOMEST is a playable word

grewsome Scrabble® Dictionary

adjective
grewsomer, grewsomest
gruesome
384 Playable Words can be made from "GREWSOMEST"
   2-Letter Words (19 found)
   7-Letter Words (8 found)
   8-Letter Words (2 found)
   10-Letter Words (1 found)