Champion's rhymes with:
champions, champions, champions, olympians, champions, ethiopians, homosapiens, mississippians, olympians, sapiens, scorpions, utopians
Champion's sounds like:
campanis, camping, championing, champions, chimpanzee, chimpanzees, chomping, combines, combing, combining, comeuppance, comfinance, companies, companies', companies's, companions, company's, confines, confining, connivance, conniving, convenes, convenience, conveniences, convening, conveyance, conveying, convince, convinces