stunt flying vs flying

stunt flying and flying both are nouns.

Word	Noun	Adjective	Verb	Adverb
stunt flying	Yes	No	No	No
flying	Yes	Yes	No	No

As nouns, flying is a hypernym of stunt flying; that is, flying is a word with a broader meaning than stunt flying:

Other hypernyms of stunt flying include flight.

stunt flying (noun)	flying (noun)
the performance of stunts while in flight in an aircraft	an instance of traveling by air

stunt flying (adjective)	flying (adjective)
	hurried and brief
	moving swiftly