success vs great

success and great both are nouns.

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

As nouns, great is a hyponym of success; that is, great is a word with a more specific, narrower meaning than success:

Other hyponyms of success include first lady, highflier, highflyer, natural, sleeper.

success (noun)	great (noun)
an attainment that is successful	a person who has achieved distinction and honor in some field
an event that accomplishes its intended purpose
a person with a record of successes
a state of prosperity or fame

success (adjective)	great (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