Cancer rhymes with:
anticancer, advancer, answer, anticancer, dancer, danser, enhancer, ganser, lancer, lanser, manser, mansour, mansur, pancer, prancer
Cancer sounds like:
cancro, canker, cannizzaro, cencor, censer, censor, censure, chancery, changer, cocanougher, commissar, commissary, conagra, concur, conger, conjure, conjuror, connoisseur, conquer, conqueror, conser