superorder vs taxon

superorder and taxon both are nouns.

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

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

superorder: (biology) a taxonomic group ranking above an order and below a class or subclass
taxon: animal or plant group having natural relations

Other hypernyms of superorder include taxonomic category, taxonomic group.

superorder (noun)	taxon (noun)
(biology) a taxonomic group ranking above an order and below a class or subclass	animal or plant group having natural relations