superabundance vs overmuchness

superabundance and overmuchness both are nouns.

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

As nouns, superabundance and overmuchness are synonyms defined as:

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

Other synonyms of superabundance include overabundance, overmuch.

superabundance (noun)	overmuchness (noun)
a quantity that is more than what is appropriate	a quantity that is more than what is appropriate