Pump rhymes with:
bump, chump, clump, crump, dump, frump, grump, gump, gumpp, hump, jump, klump, klumpp, kump, lump, lumpp, plump, rump, slump, stump, stumpe, stumpp, sump, thump, trump
Pump sounds like:
pamby, phaneuf, pimp, pohnpei, pombo, pomp, pompa, pompeo, pompey