cache

(noun) a hidden storage space (for money or provisions or weapons).

(noun) a secret store of valuables or money. Synonyms: hoard, stash.

(noun) (computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated; used to optimize data transfers between system elements with different characteristics. Synonyms: memory cache.

(verb) save up as for future use. Synonyms: hoard, stash, lay away, hive up, squirrel away.