air lane vs glide path

air lane and glide path both are nouns.

Word	Noun	Adjective	Verb	Adverb
air lane	Yes	No	No	No
glide path	Yes	No	No	No

As nouns, glide path is a hyponym of air lane; that is, glide path is a word with a more specific, narrower meaning than air lane:

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

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

air lane (noun)	glide path (noun)
a designated route followed by airplanes in flying from one airport to another	the final path followed by an aircraft as it is landing