necromancer vs magus

necromancer and magus both are nouns.

Word	Noun	Adjective	Verb	Adverb
necromancer	Yes	No	No	No
magus	Yes	No	No	No

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

Other hyponyms of necromancer include enchanter, exorciser, exorcist, sorceress, witch doctor.

necromancer (noun)	magus (noun)
one who practices magic or sorcery	a magician or sorcerer of ancient times
one who practices divination by conjuring up the dead	a member of the Zoroastrian priesthood of the ancient Persians