Isoptera vs class Insecta

Isoptera and class Insecta both are nouns.

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

Isoptera (noun)	class Insecta (noun)
order of social insects that live in colonies, including: termites; often placed in subclass Exopterygota	insects; about five-sixths of all known animal species