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