HUMPS is a playable word

hump Scrabble® Dictionary

verb
humped, humping, humps
to arch into a hump (a rounded protuberance)
25 Playable Words can be made from "HUMPS"
   2-Letter Words (7 found)
   3-Letter Words (9 found)
   4-Letter Words (7 found)
   5-Letter Words (2 found)