nimiety vs overabundance

nimiety and overabundance both are nouns.

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

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

Other hypernyms of nimiety include overmuch, overmuchness, superabundance.

nimiety (noun)	overabundance (noun)
a quantity much larger than is needed	a quantity that is more than what is appropriate
	the state of being more than full