Dumbo rhymes with:
colombo, columbo, cumbo, gumbo, jumbo, mumbo, palumbo, stumbo, trumbo, archambault, archambeault, bimbo, colombo, columbo, cumbo, gumbo, gumbo-limbo, jumbo, lembo, limbo, mambo, mumbo, palombo, palumbo, pombo, rambo, rambow, sambo, shambo, stumbo, tambo, trumbo, zambo
Dumbo sounds like:
damp, danby, danube, danvy, demby, demov, denbo, denbow, denby, deneuve, deneve, dinovo, dumb, dump, dumpy, dunfee, dunphy