bus station vs bus terminal

bus station and bus terminal both are nouns.

Word	Noun	Adjective	Verb	Adverb
bus station	Yes	No	No	No
bus terminal	Yes	No	No	No

As nouns, bus station and bus terminal are synonyms defined as:

Other synonyms of bus station include bus depot, coach station.

bus station (noun)	bus terminal (noun)
a terminal that serves bus passengers	a terminal that serves bus passengers