UPHEAPS is a playable word

upheap Scrabble® Dictionary

verb
upheaped, upheaping, upheaps
to heap up
80 Playable Words can be made from "UPHEAPS"
   2-Letter Words (13 found)
   5-Letter Words (7 found)
   6-Letter Words (1 found)
   7-Letter Words (2 found)