bus station vs coach station

bus station and coach station both are nouns.

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

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

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

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