family vs gens

family and gens both are nouns.

Word	Noun	Adjective	Verb	Adverb
family	Yes	No	No	No
gens	Yes	No	No	No

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

Other hyponyms of family include people, homefolk, house, dynasty, name.

family (noun)	gens (noun)
primary social group; parents and children	family based on male descent
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