narcissism vs conceit

narcissism and conceit both are nouns.

Word	Noun	Adjective	Verb	Adverb
narcissism	Yes	No	No	No
conceit	Yes	No	No	No

As nouns, conceit is a hypernym of narcissism; that is, conceit is a word with a broader meaning than narcissism:

Other hypernyms of narcissism include conceitedness, vanity.

narcissism (noun)	conceit (noun)
an exceptional interest in and admiration for yourself	the trait of being unduly vain and conceited; false pride
	a witty or ingenious turn of phrase
	an artistic device or effect
	an elaborate poetic image or a far-fetched comparison of very dissimilar things
	feelings of excessive pride