GROWTHIEST is a playable word

growthy Scrabble® Dictionary

adjective
growthier, growthiest
fast-growing
514 Playable Words can be made from "GROWTHIEST"
   2-Letter Words (27 found)
   3-Letter Words (80 found)
   8-Letter Words (7 found)
   9-Letter Words (1 found)
   10-Letter Words (2 found)