Hexapoda vs Lepidoptera

Hexapoda and Lepidoptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hexapoda	Yes	No	No	No
Lepidoptera	Yes	No	No	No

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