Numb rhymes with:
ancrum, baucum, become, bluhm, boyum, brum, brumm, bum, chum, clum, come, crum, crumb, crumm, cum, drum, drumm, dum, dumb, dumm, exum, from, frum, glum, grum, gum, gumm, hmmm, hohum, hum, humm, klumb, krum, krumm, krumme, kumm, lum, lumb, lumm, maam, mccrum, mccrumb, mum, mumm, mumme, narum, pflum, plum, plumb, rum, schrum, schum, schumm, scum, sharum, shrum, shum, slum, some, strum, stum, stumm, succumb, sum, swum, thum, thumb, thumm, um, umm, yum
Numb sounds like:
naab, nab, nabb, nabi, nabob, naef, naeve, naff, naify, naive, nambi, namibia, namphy, nanobaby, nap, napa, napea, napp, nappa, nappi, nappo, nav, nava, nave, navy, neave, neeb, neef, neff, nepa, nephew, neuhoff, neva, neve, neveau, neveu, newbie, newby, newwave, nib, nibbe, niehoff, nimby, nineveh, nip, nipp, nippy, nobbe, nobuo, nope, nouveau, nov, nova, novey, novi, novia, novo, novoa, novy, nub, nuevo, nuova, nuovo, nymph