poor people vs people

poor people and people both are nouns.

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

As nouns, people is a hypernym of poor people; that is, people is a word with a broader meaning than poor people:

poor people: people without possessions or wealth (considered as a group)
people: (plural) any group of human beings (men or women or children) collectively

poor people (noun)	people (noun)
people without possessions or wealth (considered as a group)	(plural) any group of human beings (men or women or children) collectively
	the body of citizens of a state or country
	members of a family line
	the common people generally

poor people (verb)	people (verb)
	fill with people
	furnish with people