coach station vs bus station

coach station and bus station both are nouns.

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

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

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

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