superabundance vs overabundance

superabundance and overabundance both are nouns.

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

As nouns, superabundance and overabundance are synonyms defined as:

superabundance and overabundance: a quantity that is more than what is appropriate

Other synonyms of superabundance include overmuch, overmuchness.

superabundance (noun)	overabundance (noun)
a quantity that is more than what is appropriate	a quantity that is more than what is appropriate
	the state of being more than full