demon vs dybbuk

demon and dybbuk both are nouns.

Word	Noun	Adjective	Verb	Adverb
demon	Yes	No	No	No
dybbuk	Yes	No	No	No

As nouns, dybbuk is a hyponym of demon; that is, dybbuk is a word with a more specific, narrower meaning than demon:

demon: an evil supernatural being
dybbuk: (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior

Other hyponyms of demon include incubus, succuba, succubus, dibbuk.

demon (noun)	dybbuk (noun)
an evil supernatural being	(Jewish folklore) a demon that enters the body of a living person and controls that body's behavior
a cruel wicked and inhuman person
someone extremely diligent or skillful