cacheEnglishOxford American Thesauruscache noun 1 a cache of arms was seized in North London | a cache of gold coins: hoard, store, stockpile, stock, supply, collection, accumulation, reserve, fund; arsenal; hidden treasure, treasure; nest egg; informal stash; rare amassment. 2 a niche in the rocks that could be used for a cache: hiding place, storage place, secret place, hole; hideout; informal hidey-hole; informal , dated stash.