train depot vs railway station

train depot and railway station both are nouns.

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

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

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

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

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