train station vs railroad terminal

train station and railroad terminal both are nouns.

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

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

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

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

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