Lumpp rhymes with:
clump, klump, klumpp, lump, plump, slump, bump, chump, clump, crump, dump, frump, grump, gump, gumpp, hump, jump, klump, klumpp, kump, lump, plump, pump, rump, slump, stump, stumpe, stumpp, sump, thump, trump
Lumpp 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, lumpy, lymph