Lumpy rhymes with:
clumpy, bumpy, clumpy, dumpy, frumpy, grumpy, jumpy, bumpy, campi, campy, ciampi, clumpy, dumpy, empey, empie, frumpy, grumpy, jumpy, lampi, pompey, rampey, rampy, sampey, skimpy, stimpy, swampy, tempe, wimpee, wimpy
Lumpy sounds like:
lamb, lambe, lambeau, lambie, lamboy, lamby, lamp, lampe, lampf, lampi, lampo, lampp, laneve, lehnhoff, lembo, lemp, lenhoff, limb, limbo, limp, lineup, lomb, lomba, lumb, lump, lumpp, lymph