class Insecta vs order Corrodentia

class Insecta and order Corrodentia both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Insecta	Yes	No	No	No
order Corrodentia	Yes	No	No	No

class Insecta (noun)	order Corrodentia (noun)
insects; about five-sixths of all known animal species	an order of insects: includes booklice and bark-lice