inhumanity vs brutality

inhumanity and brutality both are nouns.

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

As nouns, brutality is a hyponym of inhumanity; that is, brutality is a word with a more specific, narrower meaning than inhumanity:

Other hyponyms of inhumanity include barbarism, barbarity, savagery, outrage, enormity.

inhumanity (noun)	brutality (noun)
an act of atrocious cruelty	a brutal barbarous savage act
the quality of lacking compassion or consideration for others	the trait of extreme cruelty