greatness vs great

greatness and great both are nouns.

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

greatness (noun)	great (noun)
the property possessed by something or someone of outstanding importance or eminence	a person who has achieved distinction and honor in some field
unusual largeness in size or extent or number

greatness (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