grade crossing vs crossway

grade crossing and crossway both are nouns.

Word	Noun	Adjective	Verb	Adverb
grade crossing	Yes	No	No	No
crossway	Yes	No	No	No

As nouns, crossway is a hypernym of grade crossing; that is, crossway is a word with a broader meaning than grade crossing:

grade crossing: intersection of a railway and a road on the same level; barriers close road when trains pass
crossway: a junction where one street or road crosses another

Other hypernyms of grade crossing include carrefour, crossing, crossroad, intersection.

grade crossing (noun)	crossway (noun)
intersection of a railway and a road on the same level; barriers close road when trains pass	a junction where one street or road crosses another