bug vs order Hemiptera

bug and order Hemiptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
bug	Yes	No	Yes	No
order Hemiptera	Yes	No	No	No

bug (noun)	order Hemiptera (noun)
insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis	plant bugs, bedbugs, some true bugs; also includes suborders Heteroptera (true bugs) and Homoptera (e.g., aphids, plant lice and cicadas)
general term for any insect or similar creeping or crawling invertebrate
a minute life form (especially a disease-causing bacterium); the term is not in technical use
a small hidden microphone; for listening secretly
a fault or defect in a computer program, system, or machine

bug (verb)	order Hemiptera (verb)
annoy persistently
tap a telephone or telegraph wire to get information