Portec's rhymes with:
adaptec's, ameritech's, ametek's, armtek's, audiotex, avtex, aztecs, biotechs, centex, cytotechs, discotheques, entex, equitex, eyetech's, gatx, genentech's, gtech's, intex, kaisertech's, latex, memtec's, metex, natec's, pillowtex, playtex, qintex, railtex, scitex, symantec's, syntex, trintex, ventritex, vertex, videotex, wedtech's, westtech's
Portec's 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, porteous, 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