Rochester's rhymes with:
wenchester's, westchester's, ancestor's, ancestors, ancestors', polyesters, protesters, protesters', protestors, wenchester's, westchester's
Rochester's sounds like:
racetrack, racetracks, racketeers, reactor's, reactors, register's, registers, registrars, registries, resistors, restores, roasters, roister's, roosters, rosters, royster's