overmuchness vs overabundance

overmuchness and overabundance both are nouns.

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

As nouns, overmuchness and overabundance are synonyms defined as:

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

Other synonyms of overmuchness include overmuch, superabundance.

overmuchness (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