Commercial's rhymes with:
commercials, commercials, commercials, commercials, herschel's, beneficial's, bushels, commercials, credentials, differentials, facials, ficials, financial's, financials, herschel's, infomercial's, infomercials, initials, marshal's, marshall's, marshals, martials, official's, officials, officials', special's, specials
Commercial's sounds like:
commerciale's, commercialize, commercials