accumulation

noun

1 the accumulation of money:

amassing, building up, build-up, collection, gathering, assembling, assembly, stockpiling, hoarding, cumulation, accrual;

rare amassment.

▷antonyms dissipation.

2 an accumulation of rubbish:

mass, build-up, pile, heap, stack, collection, gathering, stock, store, stockpile, reserve, hoard, bank, pool, fund, mine, reservoir, cumulation, accrual, aggregation, accretion, agglomerate, agglomeration.

accumulation Oxford Dictionary of English