exorcist vs necromancer

exorcist and necromancer both are nouns.

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

As nouns, necromancer is a hypernym of exorcist; that is, necromancer is a word with a broader meaning than exorcist:

Other hypernyms of exorcist include magician, sorcerer, thaumaturge, thaumaturgist, wizard.

exorcist (noun)	necromancer (noun)
someone who practices exorcism	one who practices magic or sorcery
one of the minor orders in the unreformed Western Church but now suppressed in the Roman Catholic Church	one who practices divination by conjuring up the dead