class Hexapoda vs order Hymenoptera

class Hexapoda and order Hymenoptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hexapoda	Yes	No	No	No
order Hymenoptera	Yes	No	No	No

class Hexapoda (noun)	order Hymenoptera (noun)
insects; about five-sixths of all known animal species	an order of insects including: bees, wasps, ants, ichneumons, sawflies, gall wasps, etc.