overabundance vs overmuchness

overabundance and overmuchness both are nouns.

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

As nouns, overabundance and overmuchness are synonyms defined as:

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

Other synonyms of overabundance include overmuch, superabundance.

overabundance (noun)	overmuchness (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