order Corrodentia vs class Insecta

order Corrodentia and class Insecta both are nouns.

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

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