skyway vs airway

skyway and airway both are nouns.

Word	Noun	Adjective	Verb	Adverb
skyway	Yes	No	No	No
airway	Yes	No	No	No

As nouns, skyway and airway are synonyms defined as:

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

Other synonyms of skyway include air lane, flight path.

skyway (noun)	airway (noun)
a designated route followed by airplanes in flying from one airport to another	a commercial enterprise that provides scheduled flights for passengers
	a duct that provides ventilation (as in mines)
	the passages through which air enters and leaves the body
	a designated route followed by airplanes in flying from one airport to another