copiousness vs abundance

copiousness and abundance both are nouns.

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

As nouns, copiousness and abundance are synonyms defined as:

copiousness and abundance: the property of a more than adequate quantity or supply

Other synonyms of copiousness include teemingness.

copiousness (noun)	abundance (noun)
the property of a more than adequate quantity or supply	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