half-and-half

absorption, blending, coalescence, coalition, commingling, commixture, compost, concretion, 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