Trumbo rhymes with:
colombo, columbo, cumbo, dumbo, gumbo, jumbo, mumbo, palumbo, stumbo, archambault, archambeault, bimbo, colombo, columbo, cumbo, dumbo, gumbo, gumbo-limbo, jumbo, lembo, limbo, mambo, mumbo, palombo, palumbo, pombo, rambo, rambow, sambo, shambo, stumbo, tambo, zambo
Trumbo sounds like:
tarnoff, terranova, tramp, trampe, trimpe, trinova, triomphe, triumph, tromp, trump, turnbo, turnbow, turnip, turnoff