Hopper's rhymes with:
hoppers, boppers, chopper's, choppers, copper's, coppers, droppers, hoppers, koppers, koppers', loppers, poppers, shopper's, shoppers, shoppers', stoppers, toppers, whoppers
Hopper's sounds like:
haubrich, heiberg, heifers, hoberg, hoover's, hopburg, hopburg's, hoppers, hovers, hovorka, hubers, hubris