a place of storage or a magazine containing arms and military equipment for land or naval service.

a government establishment where military equipment or munitions are manufactured.

a collection or supply of weapons or munitions.

a collection or supply of anything; store

He came to the meeting with an impressive arsenal of new research data.

noun

armory , depository , depot , dump , factory , magazine , ordnance , plant , repository , stock , stockpile , store , storehouse , supply , warehouse , dockyard , weapons