insect vs unpleasant person

insect and unpleasant person both are nouns.

Word	Noun	Adjective	Verb	Adverb
insect	Yes	No	No	No
unpleasant person	Yes	No	No	No

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

insect: a person who has a nasty or unethical character undeserving of respect
unpleasant person: a person who is not pleasant or agreeable

Other hypernyms of insect include disagreeable person.

insect (noun)	unpleasant person (noun)
small air-breathing arthropod	a person who is not pleasant or agreeable
a person who has a nasty or unethical character undeserving of respect