pileup

a mass or quantity that has piled up or that has been gathered over a period of time a pileup of e-mail messages that needed to be dealt with Synonyms accretion, assemblage, collection, cumulation, cumulus, gathering, lodgment (or lodgement), accumulationRelated Words agglomerate, assortment, congeries, conglomerate, conglomeration, hodgepodge, hotchpotch, jumble, medley, mélange, mishmash, mix, mixture, motley, potpourri; agglomeration, clutter, hash, heap, litter, mass, pile; aggregate, aggregation, sum, totality; backlog, cache, fund, hoard, inventory, kitty, nest egg, reserve, stock, stockpile, store, supply