maiden flight vs flying

maiden flight and flying both are nouns.

Word	Noun	Adjective	Verb	Adverb
maiden flight	Yes	No	No	No
flying	Yes	Yes	No	No

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

Other hypernyms of maiden flight include flight.

maiden flight (noun)	flying (noun)
the first flight of its kind	an instance of traveling by air

maiden flight (adjective)	flying (adjective)
	hurried and brief
	moving swiftly