necromania vs passion

necromania and passion both are nouns.

Word	Noun	Adjective	Verb	Adverb
necromania	Yes	No	No	No
passion	Yes	No	No	No

As nouns, passion is a hypernym of necromania; that is, passion is a word with a broader meaning than necromania:

Other hypernyms of necromania include cacoethes, mania.

necromania (noun)	passion (noun)
an irresistible sexual attraction to dead bodies	the trait of being intensely emotional
	any object of warm affection or devotion
	a strong feeling or emotion
	a feeling of strong sexual desire
	an irrational but irresistible motive for a belief or action
	something that is desired intensely