sorcerer vs necromancer

sorcerer and necromancer both are nouns.

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

As nouns, sorcerer and necromancer are synonyms defined as:

Other synonyms of sorcerer include magician, thaumaturge, thaumaturgist, wizard.

sorcerer (noun)	necromancer (noun)
one who practices magic or sorcery	one who practices magic or sorcery
	one who practices divination by conjuring up the dead