Cropper rhymes with:
dropper, gropper, improper, proper, propper, bopper, chopper, clopper, copper, dropper, gropper, hopper, improper, kopper, opper, popper, proper, propper, shopper, stopper, topor, topper, whopper
Cropper sounds like:
carbary, carberry, carefree, carfora, carper, carryover, carver, cervera, corpora, craver, crevier, cribari, crivaro, crowbar