class Insecta vs Lepidoptera

class Insecta and Lepidoptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Insecta	Yes	No	No	No
Lepidoptera	Yes	No	No	No

class Insecta (noun)	Lepidoptera (noun)
insects; about five-sixths of all known animal species	moths and butterflies