web spinner vs insect

web spinner and insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
web spinner	Yes	No	No	No
insect	Yes	No	No	No

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

web spinner: any of a small order of slender typically tropical insects that nest in colonies in silken tunnels that they spin
insect: small air-breathing arthropod

web spinner (noun)	insect (noun)
any of a small order of slender typically tropical insects that nest in colonies in silken tunnels that they spin	small air-breathing arthropod
	a person who has a nasty or unethical character undeserving of respect