line of flight vs path

line of flight and path both are nouns.

Word	Noun	Adjective	Verb	Adverb
line of flight	Yes	No	No	No
path	Yes	No	No	No

As nouns, path is a hypernym of line of flight; that is, path is a word with a broader meaning than line of flight:

line of flight: the path along which a freely moving object travels through the air
path: an established line of travel or access

Other hypernyms of line of flight include itinerary, route.

line of flight (noun)	path (noun)
the path along which a freely moving object travels through the air	a course of conduct
	a way especially designed for a particular use
	an established line of travel or access
	a line or route along which something travels or moves