highflyer vs success

highflyer and success both are nouns.

Word	Noun	Adjective	Verb	Adverb
highflyer	Yes	No	No	No
success	Yes	No	No	No

As nouns, success is a hypernym of highflyer; that is, success is a word with a broader meaning than highflyer:

Other hypernyms of highflyer include achiever, succeeder, winner.

highflyer (noun)	success (noun)
a person of great ability and ambition	an attainment that is successful
	an event that accomplishes its intended purpose
	a person with a record of successes
	a state of prosperity or fame