necromancy vs divination

necromancy and divination both are nouns.

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

As nouns, divination is a hypernym of necromancy; that is, divination is a word with a broader meaning than necromancy:

necromancy: conjuring up the dead, especially for prophesying
divination: the art or gift of prophecy (or the pretense of prophecy) by supernatural means

Other hypernyms of necromancy include foretelling, fortune telling, soothsaying.

necromancy (noun)	divination (noun)
conjuring up the dead, especially for prophesying	the art or gift of prophecy (or the pretense of prophecy) by supernatural means
the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world	a prediction uttered under divine inspiration
	successful conjecture by unusual insight or good luck