Zappa's rhymes with:
aliquippa's, aliquippas, bumpas, chiapas', copas, hietpas, kopas, pampas, papas, petipa's, serpas, skippa's, tampa's, tenpas, willapa's
Zappa's sounds like:
zabows, zabowski, zaps, zbig, zbikowski, zhivago, zickefoose, ziff's, zips, zupko