Pertussis rhymes with:
actinomycosis, airbases, alexis, amniocentesis, anaphylaxis, atherosclerosis, beschloss's, biosys, cassis, cedras's, consis, dedominicis, dimitrius's, duplessis, electrophoresis, elephantiasis, elexis, endometriosis, frances, hammas's, ilalis's, kassis, kocis, kocsis, lexis, lysis, metastasis, microgenesys, molpus's, narcisse, nemesis, neurofibromatosis, nexis, oasis, onassis, onassis', onassis's, organogenesis, osmosis, osteoporosis, parenthesis, persis, photophoresis, photosynthesis, phototaxis, plessis, praxis, preadolescence, prosthesis, publicis, pyxis, rox's, sepsis, solstices, stephanopoulos's, synopsis, tarses, telesis, telexes, thrombolysis, toufexis, transgresses, tuberculosis, urinalysis, vince's
Pertussis 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, 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