Jumbo rhymes with:
colombo, columbo, cumbo, dumbo, gumbo, mumbo, palumbo, stumbo, trumbo, archambault, archambeault, bimbo, colombo, columbo, cumbo, dumbo, gumbo, gumbo-limbo, lembo, limbo, mambo, mumbo, palombo, palumbo, pombo, rambo, rambow, sambo, shambo, stumbo, tambo, trumbo, zambo