Lumb rhymes with:
bluhm, clum, glum, klumb, lum, lumm, pflum, plum, plumb, slum
Lumb 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, lump, lumpp, lumpy, lymph