WordNet (r) 3.0 (2006):

consortium
    n 1: an association of companies for some definite purpose [syn:
         consortium, pool, syndicate]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "consortium":
   Aktiengesellschaft, accord, agreement, aktiebolag, arrangement,
   bargain, binding agreement, body corporate, bond, business,
   business establishment, cartel, chamber of commerce, club,
   collective agreement, combine, commercial enterprise, compact,
   compagnie, company, concern, conglomerate,
   conglomerate corporation, congress, consolidating company,
   contract, convention, copartnership, cordial understanding,
   corporate body, corporation, covenant, covenant of salt, deal,
   dicker, diversified corporation, employment contract, entente,
   entente cordiale, enterprise, fellowship, firm, formal agreement,
   fraternity, guild, holding company, house, industry,
   ironclad agreement, joint-stock association, joint-stock company,
   league, legal agreement, legal contract, mutual agreement,
   mutual understanding, operating company, order, pact, paction,
   partnership, plunderbund, pool, promise, protocol, public utility,
   society, stipulation, stock company, syndicate, trade association,
   transaction, trust, understanding, union, union contract, utility,
   valid contract, wage contract



The Free On-line Dictionary of Computing (30 December 2018):

consortium

    A group of two or more companies, educational
   institutions, governments or other bodies with some shared
   purpose.

   Examples from computing include the World Wide Web
   Consortium (W3C), Apache Software Foundation, The Open
   Group, X Consortium.

   (2009-06-05)