class Insecta vs Hemiptera

class Insecta and Hemiptera both are nouns.

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

class Insecta (noun)	Hemiptera (noun)
insects; about five-sixths of all known animal species	plant bugs, bedbugs, some true bugs; also includes suborders Heteroptera (true bugs) and Homoptera (e.g., aphids, plant lice and cicadas)