Fischer's rhymes with:
fisher's, fishers, fissures, fisher's, fishers, fissures, wishers, afshar's, bashers, boshers, brashers, crushers, desrochers, dishwashers, extinguishers, finishers, fisher's, fishers, fissures, flasher's, flashers, glacier's, glaciers, gushers, hampshire's, hamptonshire's, hasher's, hashers, kingfishers, mushers, new-hampshire's, photofinishers, pressure's, pressures, publisher's, publishers, publishers', pushers, staffordshire's, ushers, washers, wishers
Fischer's sounds like:
fakers, ficorca, fieger's, figaroa's, figueras, figure's, figures, figurski, fisher's, fisheries, fishers, fissures, fokkers, fuckers