Cache

Word: [noun] cache (a hidden storage space (for money or provisions or weapons))

Word: [noun] cache ((computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated)

Synonyms: memory cache

Word: [noun] cache (a secret store of valuables or money)

Synonyms: hoard, stash

Word: [verb] cache (to save up as for future use)

Synonyms: hoard, stash, lay away, hive up, squirrel away

Example: We cache water in case of a hurricane.