Lepidoptera vs Hexapoda

Lepidoptera and Hexapoda both are nouns.

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

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