The Collaborative International Dictionary of English v.0.48:

Conglomeration \Con*glom`er*a"tion\, n. [L. conglomeratio: cf.
   F. conglomeration.]
   1. The act or process of gathering into a mass; the state of
      being thus collected; collection; accumulation. --Bacon.
      [1913 Webster]

   2. That which is conglomerated; a mixed mass; a hodgepodge.
      [1913 Webster]

WordNet (r) 3.0 (2006):

conglomeration
    n 1: a rounded spherical form [syn: conglomeration,
         conglobation]
    2: a sum total of many heterogenous things taken together [syn:
       aggregate, congeries, conglomeration]
    3: an occurrence combining miscellaneous things into a (more or
       less) rounded mass [syn: conglomeration, conglobation]

Moby Thesaurus II by Grady Ward, 1.0:

182 Moby Thesaurus words for "conglomeration":
   Anschluss, accretion, accumulation, acervation, addition,
   adherence, adhesion, affiliation, agglomerate, agglomeration,
   agglutination, aggregate, aggregation, agreement, all sorts,
   alliance, amalgamation, amassment, articulation, assemblage,
   assimilation, association, assortment, blend, blending, block,
   body, bond, bracketing, breccia, broad spectrum, bunch, cabal,
   cake, cartel, centralization, chunk, cling, clinging, clot,
   clotting, clump, cluster, clustering, coagulation, coalescence,
   coalition, coherence, cohesion, cohesiveness, collectanea,
   collection, colluvies, combination, combine, combo, communication,
   compaction, composition, concatenation, concourse, concrete,
   concretion, concurrence, condensation, confederacy, confederation,
   confluence, congealment, congelation, congeries, conglobation,
   conglomerate, conjugation, conjunction, connection, consolidation,
   conspiracy, convergence, copulation, coupling, cumulation,
   ecumenism, embodiment, encompassment, enosis, federalization,
   federation, fusion, gallimaufry, gathering, glomeration, gob, hash,
   hoard, hodgepodge, hookup, hotchpot, hotchpotch, hunk, inclusion,
   incorporation, inseparability, integration, intercommunication,
   intercourse, interlinking, joinder, joining, jointure, jumble,
   junction, junta, knot, knotting, league, liaison, linkage, linking,
   lump, magpie, marriage, mash, mass, medley, meeting, melange, meld,
   melding, merger, merging, mess, mingle-mangle, miscellanea,
   miscellany, mishmash, mix, mixed bag, mixture, node, oddments,
   odds and ends, olio, olla podrida, omnium-gatherum, package,
   package deal, pairing, pasticcio, pastiche, patchwork, potpourri,
   salad, salmagundi, sauce, scramble, set, snowball, solid,
   solid body, solidification, splice, stew, sticking, stockpile,
   sundries, symbiosis, syncretism, syndication, syneresis, synthesis,
   tie, tie-in, tie-up, trove, unification, union, variety, wad,
   wedding, what you will, yoking