Port_au_prince rhymes with:
port-au-prince, port-au-prince, port-au-prince, port-au-prince, prince, port-au-prince, prince, rinse, convince, dinse, evince, ince, lince, linse, mince, port-au-prince, prince, quince, rinse, since, vince, wince
Port_au_prince sounds like:
port-au-prince, protuberance, protuberances