family vs taxon

family and taxon both are nouns.

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

As nouns, taxon is a hypernym of family; that is, taxon is a word with a broader meaning than family:

Other hypernyms of family include taxonomic category, taxonomic group.

family (noun)	taxon (noun)
primary social group; parents and children	animal or plant group having natural relations
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