Entrepot and Powder store

Entrepot noun - A port where merchandise can be imported and then exported without paying import duties.

Powder store and entrepot are semantically related. In some cases you can replace phrase "Powder store" with "Entrepot", this terms are similar.

Powder store noun - A storehouse (as a compartment on a warship) where weapons and ammunition are stored.

Entrepot and powder store are semantically related. You can use "Entrepot" instead a noun phrase "Powder store".