incubus vs unpleasant person

incubus and unpleasant person both are nouns.

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

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

Other hypernyms of incubus include disagreeable person.

incubus (noun)	unpleasant person (noun)
a male demon believed to lie on sleeping persons and to have sexual intercourse with sleeping women	a person who is not pleasant or agreeable
someone who depresses or worries others
a situation resembling a terrifying dream