railroad station vs train depot

railroad station and train depot both are nouns.

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

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

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

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

railroad 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