Kansans' rhymes with:
arkansans, kansan's, kansans, arkansans, kansan's, kansans, arkansans, kansan's, kansans, arkansans, artisans, citizen's, citizens, citizens', cousin's, cousins, couzens, cozzens, denizens, dozens, fisons, gazans, horizon's, horizons, imprisons, kansan's, kansans, partisans, poisons, prison's, prisons, raisins, reasons, resins, rosen's, season's, seasons, susan's, telxon's
Kansans' sounds like:
kansan's, kansans, keynesians, knick-knack, knick-knacks, knickknack, knickknacks, knocking, kyongsang