Thesaurus.com is a great website which can tell you this. But otherwise.. here are some answers that may help you!:-

account, advantage, advantageousness, aktiebolag, alternate, alternative, appliance, applicability,appropriateness, availability, backup, beneficialness, body corporate, business, business establishment, cartel,chamber of commerce, combine, commercial enterprise, compagnie, company, concern, conglomerate,conglomerate corporation, consolidating company, consortium, convenience, copartnership, corporate body,corporation, counterfeit, diversified corporation, drive, dummy, effectiveness, efficacy, efficiency, engine, enginery,enterprise, equivalent, ersatz, facility, fake, favorableness, firm, fitness, fixture, functionality, helpfulness,holding company, house, imitation, industry, joint-stock association, joint-stock company, machine, machinery,makeshift, mechanical aid, mechanical device, mechanism, mock, motive power, motor, operability,operating company, partnership, phony, pinch, plunderbund, pool, power plant, power source, practicability,practical utility, practicality, profitability, provisional, proxy, public utility, relevance, reserve, secondary, service,serviceability, spare, stock company, stopgap, substitute, syndicate, temporary, tentative, token, trade association,trust, usability, use, usefulness, utilizability, vicarious

I Hope that I Helped :D xOx