powder store vs storage

powder store and storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
powder store	Yes	No	No	No
storage	Yes	No	No	No

As nouns, storage is a hypernym of powder store; that is, storage is a word with a broader meaning than powder store:

powder store: a storehouse (as a compartment on a warship) where weapons and ammunition are stored
storage: a depository for goods

Other hypernyms of powder store include depot, entrepot, store, storehouse.

powder store (noun)	storage (noun)
a storehouse (as a compartment on a warship) where weapons and ammunition are stored	the commercial enterprise of storing goods and materials
	the act of storing something
	depositing in a warehouse
	a depository for goods
	an electronic memory device
	(computer science) the process of storing information in a computer memory or on a magnetic tape or disk