railway station vs train depot

railway station and train depot both are nouns.

Word	Noun	Adjective	Verb	Adverb
railway station	Yes	No	No	No
train depot	Yes	No	No	No

As nouns, railway station and train depot are synonyms defined as:

railway station and train depot: a terminal/node where trains load or unload passengers or goods

Other synonyms of railway station include railroad station, railroad terminal, train station.

railway station (noun)	train depot (noun)
a terminal/node where trains load or unload passengers or goods	a terminal/node where trains load or unload passengers or goods