Mumbo rhymes with:
colombo, columbo, cumbo, dumbo, gumbo, jumbo, palumbo, stumbo, trumbo, archambault, archambeault, bimbo, colombo, columbo, cumbo, dumbo, gumbo, gumbo-limbo, jumbo, lembo, limbo, mambo, palombo, palumbo, pombo, rambo, rambow, sambo, shambo, stumbo, tambo, trumbo, zambo
Mumbo sounds like:
m'bow, mab, mabe, mabee, mabey, mabie, maeve, maffei, maffeo, maffia, mafia, mahaffey, mahaffy, mahvi, mamba, mambo, manoff, manweb, map, mapi, mapp, mauve, mav, mave, maybe, maybee, meave, mehaffey, menefee, menifee, mib, minebea, moab, mob, mobay, mobe, moby, mof, moffa, mop, mope, move, movie, mph, muff, muffy, mumbai, mumby, mummify, munafo, myopia