class Hexapoda vs Hymenoptera

class Hexapoda and Hymenoptera both are nouns.

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

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