combination

half-and-half

absorption, blending, coalescence, coalition, commingling, commixture, homogenization, immingling, immixture, incorporation, integration, interfusion, intermingling, mergence, merger, merging, mingling

assortment, hash, hodgepodge, hotchpotch, jumble, medley, mélange, mishmash, motley, patchwork, potpourri, variety

accumulation, aggregation, conglomeration

agglomeration, amalgamation, blend, coalescence, commingling, compounding, fusion, intermingling, intermixture, mingling, mix, mixture, synthesis

reunification, reunion

chain, conglomerate, megacorporation, multinational

association, guild (also gild), organization, partnership, pool, union

big business

cabal, conspiracy, junto

cartel, syndicate, trust

faction, front, fusion, side, wing

association, group, organization

affiliation, cooperative, partnership

circuit, conference