airway vs flight path

airway and flight path both are nouns.

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

As nouns, airway and flight path are synonyms defined as:

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

Other synonyms of airway include air lane, skyway.

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