subway station vs depot

subway station and depot both are nouns.

Word	Noun	Adjective	Verb	Adverb
subway station	Yes	No	No	No
depot	Yes	No	No	No

As nouns, depot is a hypernym of subway station; that is, depot is a word with a broader meaning than subway station:

subway station: a terminal/node where subways/rapid transit systems load and unload passengers
depot: station where transport vehicles load or unload passengers or goods

Other hypernyms of subway station include terminal, terminus.

subway station (noun)	depot (noun)
a terminal/node where subways/rapid transit systems load and unload passengers	station where transport vehicles load or unload passengers or goods
	a depository for goods