airway vs approach path

airway and approach path both are nouns.

Word	Noun	Adjective	Verb	Adverb
airway	Yes	No	No	No
approach path	Yes	No	No	No

As nouns, approach path is a hyponym of airway; that is, approach path is a word with a more specific, narrower meaning than airway:

airway: a designated route followed by airplanes in flying from one airport to another
approach path: the final path followed by an aircraft as it is landing

Other hyponyms of airway include approach, glide path, glide slope, holding pattern.

airway (noun)	approach path (noun)
a commercial enterprise that provides scheduled flights for passengers	the final path followed by an aircraft as it is landing
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