Porteous rhymes with:
pontius, tertius, agius, ambrosius, beckius, blasius, brixius, brosius, cornelious, crecelius, dinius, flavius, graffius, gurganious, iglesias, junius, lanius, launius, lenius, melius, milius, moebius, nevius, pastorius, pocius, pontius, redenius, sartorius, silvius, tertius, tullius
Porteous sounds like:
parades, paradis, paradise, paradiso, paradowski, paradox, paradoxes, pardus, paredes, paredez, paredis, parities, parodies, parretti's, parrots, part's, partake, partch, parties, parties', parts, parts', party's, partyka, pavarotti's, pepperidge, peratis, peratis', peretz, period's, periodic, periods, perot's, perots, peroutka, pertschuk, pertussis, pirate's, pirates, pirouettes, porridge, port's, portage, portec, portec's, portico, portis, ports, portuguese, portz, pradesh, prats, pratt's, predaceous, predates, pretax, pretties, prideaux, prides, priorities, prioritize, prioritizes, pritts, pritz, prodi's, prodigies, prodigious, prodigy, prodigy's, prods, produc, produce, produces, protease, protege, proteges, protozoa, protz, prudish