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