humankind vs humanity

humankind and humanity both are nouns.

Word	Noun	Adjective	Verb	Adverb
humankind	Yes	No	No	No
humanity	Yes	No	No	No

As nouns, humankind and humanity are synonyms defined as:

humankind and humanity: all of the living human inhabitants of the earth

Other synonyms of humankind include human beings, human race, humans, man, mankind, world.

humankind (noun)	humanity (noun)
all of the living human inhabitants of the earth	all of the living human inhabitants of the earth
	the quality of being humane
	the quality of being human