bewitchment vs black art

bewitchment and black art both are nouns.

Word	Noun	Adjective	Verb	Adverb
bewitchment	Yes	No	No	No
black art	Yes	No	No	No

As nouns, black art is a hypernym of bewitchment; that is, black art is a word with a broader meaning than bewitchment:

bewitchment: a magical spell
black art: the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world

Other hypernyms of bewitchment include black magic, necromancy, sorcery.

bewitchment (noun)	black art (noun)
a magical spell	the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world