depot vs powder store

depot and powder store both are nouns.

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

As nouns, powder store is a hyponym of depot; that is, powder store is a word with a more specific, narrower meaning than depot:

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

depot (noun)	powder store (noun)
station where transport vehicles load or unload passengers or goods	a storehouse (as a compartment on a warship) where weapons and ammunition are stored
a depository for goods