Parts' rhymes with:
departs, imparts, part's, parts, spartz, art's, arts, artz, bart's, barts, bartz, carts, charts, dart's, darts, departs, descartes's, hart's, harts, hartz, heart's, hearts, imparts, k-mart's, kartes, mart's, marts, martz, part's, parts, schartz, smarts, spartz, starts, tarts, upstarts
Parts' 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, 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, 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