overabundance vs abundance

overabundance and abundance both are nouns.

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

As nouns, abundance is a hypernym of overabundance; that is, abundance is a word with a broader meaning than overabundance:

Other hypernyms of overabundance include copiousness, teemingness.

overabundance (noun)	abundance (noun)
a quantity that is more than what is appropriate	the property of a more than adequate quantity or supply
the state of being more than full	(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