skyway vs air lane

skyway and air lane both are nouns.

Word	Noun	Adjective	Verb	Adverb
skyway	Yes	No	No	No
air lane	Yes	No	No	No

As nouns, skyway and air lane are synonyms defined as:

skyway and air lane: a designated route followed by airplanes in flying from one airport to another

Other synonyms of skyway include airway, flight path.

skyway (noun)	air lane (noun)
a designated route followed by airplanes in flying from one airport to another	a designated route followed by airplanes in flying from one airport to another