a supply of material, as a pile of gravel in road maintenance.

a large supply of some metal, chemical, food, etc., gathered and held in reserve for use during a shortage or during a period of higher prices.

a quantity, as of munitions or weapons, accumulated for possible future use.

to accumulate (material, goods, or the like) for future use; put or store in a stockpile.

to accumulate in a stockpile.

noun

accumulation , buildup , cache , hoard , inventory , nest egg , reserve , source , stash , stock , store , surplus , backlog , reservoir , treasure

verb

accumulate , amass , build up , gather , hoard , keep on hand , put away , reserve , save , squirrel away , stash , stock up , store , stow away , lay in , lay up , squirrel , treasure , backlog , heap , inventory