STOCKPILE
stockpile
(noun) a storage pile accumulated for future use
reserve, backlog, stockpile
(noun) something kept back or saved for future use or a special purpose
stock, carry, stockpile
(verb) have on hand; “Do you carry kerosene heaters?”
Source: WordNet® 3.1
Etymology
Noun
stockpile (plural stockpiles)
A supply, especially a large one, of something kept for future use.
Verb
stockpile (third-person singular simple present stockpiles, present participle stockpiling, simple past and past participle stockpiled)
To accumulate a stockpile.
Source: Wiktionary