OVERHEAPING is a playable word

overheap Scrabble® Dictionary

verb
overheaped, overheaping, overheaps
to heap up or accumulate to excess
574 Playable Words can be made from "OVERHEAPING"
   2-Letter Words (30 found)
   3-Letter Words (112 found)
   9-Letter Words (1 found)
   11-Letter Words (1 found)