superfamily vs taxon

superfamily and taxon both are nouns.

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

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

superfamily: (biology) a taxonomic group ranking below an order but above a family
taxon: animal or plant group having natural relations

Other hypernyms of superfamily include taxonomic category, taxonomic group.

superfamily (noun)	taxon (noun)
(biology) a taxonomic group ranking below an order but above a family	animal or plant group having natural relations