storehouse; storage facility; repository
A building or structure for storing goods, supplies, or materials; can refer to warehouses, silos, bunkers, or other storage spaces.
The farmer stores the harvested rice in a storehouse.
An old ammunition bunker remains in this area.
貯蔵 is the act of storing or stockpiling, while 貯蔵庫 is the physical place where storage occurs.
Compound of 貯蔵 (storage, preservation) and 庫 (warehouse, storehouse). The kanji 貯 means 'to store' or 'to save', 蔵 means 'storehouse' or 'to hide', and 庫 means 'warehouse' or 'repository'.