blood line vs family

blood line and family both are nouns.

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

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

Other hyponyms of blood line include family line, folk, kinfolk, kinsfolk, phratry, sept, side, breed line.

blood line (noun)	family (noun)
the hereditary derivation of an individual	primary social group; parents and children
	people descended from a common ancestor
	a social unit living together
	(biology) a taxonomic group containing one or more genera
	a collection of things sharing a common attribute
	an association of people who share common beliefs or activities
	a loose affiliation of gangsters in charge of organized criminal activities
	a person having kinship with another or others