necromancy vs Satanism

necromancy and Satanism both are nouns.

Word	Noun	Adjective	Verb	Adverb
necromancy	Yes	No	No	No
Satanism	Yes	No	No	No

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

necromancy: the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world
Satanism: a belief in and reverence for devils (especially Satan)

Other hyponyms of necromancy include witchcraft, witchery, bewitchment, enchantment, demonism, diabolism, obiism.

necromancy (noun)	Satanism (noun)
conjuring up the dead, especially for prophesying	a belief in and reverence for devils (especially Satan)
the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world