Rump rhymes with:
crump, frump, grump, trump, bump, chump, clump, crump, dump, frump, grump, gump, gumpp, hump, jump, klump, klumpp, kump, lump, lumpp, plump, pump, slump, stump, stumpe, stumpp, sump, thump, trump
Rump sounds like:
rainbow, rambeau, rambo, rambow, ramify, ramp, rampey, rampy, remove, rempe, renminbi, renouf, reunify, rimbey, romanoff, romanov, romp, rumpf, rumph, runoff, runup