Copper rhymes with:
kopper, bopper, chopper, clopper, cropper, dropper, gropper, hopper, improper, kopper, opper, popper, proper, propper, shopper, stopper, topor, topper, whopper
Copper sounds like:
cabrera, cafaro, caffery, caffrey, cafiero, caper, capper, capra, capraro, capri, caprio, casebeer, casebier, caspar, casper, caver, caviar, cease-fire, ceasefire, cepero, chaparro, chauffeur, chavarria, chavira, cheaper, cheever, chesbro, chesebro, chevrier, chipper, choper, chopper, chopra, cibro, cifra, cipher, cipri, cobra, cobre, cofer, coffaro, coffer, cooper, coover, copher, copier, coppery, copra, cosper, couper, cover, cowper, cyber, cypher