people vs mankind

people and mankind both are nouns.

Word	Noun	Adjective	Verb	Adverb
people	Yes	No	Yes	No
mankind	Yes	No	No	No

people (noun)	mankind (noun)
(plural) any group of human beings (men or women or children) collectively	all of the living human inhabitants of the earth
the body of citizens of a state or country
members of a family line
the common people generally

people (verb)	mankind (verb)
fill with people
furnish with people