Insecta vs Hexapoda

Insecta and Hexapoda both are nouns.

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

As nouns, Insecta and Hexapoda are synonyms defined as:

Insecta and Hexapoda: insects; about five-sixths of all known animal species

Other synonyms of Insecta include class Hexapoda, class Insecta.

Insecta (noun)	Hexapoda (noun)
insects; about five-sixths of all known animal species	insects; about five-sixths of all known animal species