railway station vs train station

railway station and train station both are nouns.

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

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

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

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

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