inhumaneness vs inhumanity

inhumaneness and inhumanity both are nouns.

Word	Noun	Adjective	Verb	Adverb
inhumaneness	Yes	No	No	No
inhumanity	Yes	No	No	No

As nouns, inhumaneness and inhumanity are synonyms defined as:

inhumaneness and inhumanity: the quality of lacking compassion or consideration for others

inhumaneness (noun)	inhumanity (noun)
the quality of lacking compassion or consideration for others	an act of atrocious cruelty
	the quality of lacking compassion or consideration for others