abundant vs abundance

abundant is not a noun while abundance is a noun.

Word	Noun	Adjective	Verb	Adverb
abundant	No	Yes	No	No
abundance	Yes	No	No	No

abundant (noun)	abundance (noun)
	the property of a more than adequate quantity or supply
	(chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million
	(physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present

abundant (adjective)	abundance (adjective)
present in great quantity