LUMPING is a playable word

lump Scrabble® Dictionary

verb
lumped, lumping, lumps
to make into lumps (shapeless masses)
63 Playable Words can be made from "LUMPING"
   2-Letter Words (10 found)
   3-Letter Words (27 found)
   4-Letter Words (17 found)
   5-Letter Words (3 found)
   6-Letter Words (4 found)
   7-Letter Words (2 found)