level crossing vs crossway

level crossing and crossway both are nouns.

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

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

level 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 level crossing include carrefour, crossing, crossroad, intersection.

level 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