Polygyny rhymes with:
aborigine, aborigine, androgyny, homogeny, ontogeny, phylogeny, progeny, aborigine, accompany, agony, albany, androgyny, anthony, antigone, antony, balcony, bethany, bimini, botany, boustany, brittany, cacophony, canonie, carmany, colony, compagnie, company, cormany, delany, deloney, destiny, devaney, devany, disharmony, dulaney, ebony, epiphany, euphony, felony, germany, gibboney, giboney, gluttony, harmonie, harmony, hegemony, homogeny, intercompany, intracompany, irony, larceny, litany, luciani, mahany, mahogany, mahony, mcanany, melanie, melany, meroney, monotony, mullaney, mullany, mutiny, nachmany, neoteny, o'melveny, ontogeny, paleobotany, parsippany, peony, phylogeny, polyphony, progeny, romany, saucony, saxony, scrutiny, simony, stefani, stefanie, stephani, stephanie, stephany, symphony, tammany, tiffany, timmeny, timoney, tuscany, tyranny, whippany, yemeni
Polygyny sounds like:
palazina, paleocene, paulsen, paulson, pelagian, pelekunu, pelican, pelikan, pellicane, pellicano, peloquin, philson, phlegm, phylogeny, pilson, plasma, pliocene, polcyn, policeman, policemen, policewoman, policewomen, poliquin, polskin, polson, polygamy, polygon, polzin, populism, poulsen, poulson, powelson, pulcini