air lane vs glide slope

air lane and glide slope both are nouns.

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

As nouns, glide slope is a hyponym of air lane; that is, glide slope 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 slope: the final path followed by an aircraft as it is landing

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

air lane (noun)	glide slope (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