family line vs people

family line and people both are nouns.

Word	Noun	Adjective	Verb	Adverb
family line	Yes	No	No	No
people	Yes	No	Yes	No

As nouns, people is a hyponym of family line; that is, people is a word with a more specific, narrower meaning than family line:

Other hyponyms of family line include homefolk, house, dynasty, gens, name.

family line (noun)	people (noun)
people descended from a common ancestor	(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

family line (verb)	people (verb)
	fill with people
	furnish with people