leaf miner vs insect

leaf miner and insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
leaf miner	Yes	No	No	No
insect	Yes	No	No	No

As nouns, insect is a hypernym of leaf miner; that is, insect is a word with a broader meaning than leaf miner:

leaf miner: any of various small moths or dipterous flies whose larvae burrow into and feed on leaf tissue especially of the family Gracilariidae
insect: small air-breathing arthropod

leaf miner (noun)	insect (noun)
any of various small moths or dipterous flies whose larvae burrow into and feed on leaf tissue especially of the family Gracilariidae	small air-breathing arthropod
	a person who has a nasty or unethical character undeserving of respect