great vs success

great and success both are nouns.

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

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

Other hypernyms of great include achiever, succeeder, winner.

great (noun)	success (noun)
a person who has achieved distinction and honor in some field	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

great (adjective)	success (adjective)
excellent
in an advanced stage of pregnancy
uppercase
remarkable or out of the ordinary in degree or magnitude or effect
of major significance or importance
relatively large in size or number or extent; larger than others of its kind