Companies' rhymes with:
accompanies, companies, company's, accompanies, companies, company's, accompanies, companies, company's, accompanies, companies, company's
Companies' sounds like:
campanis, camping, champion's, championing, champions, chimpanzee, chimpanzees, chomping, combines, combing, combining, comeuppance, comfinance, companies, companies's, companions, company's, confines, confining, connivance, conniving, convenes, convenience, conveniences, convening, conveyance, conveying, convince, convinces