nativity vs rebirth

nativity and rebirth both are nouns.

Word	Noun	Adjective	Verb	Adverb
nativity	Yes	No	No	No
rebirth	Yes	No	No	No

As nouns, rebirth is a hyponym of nativity; that is, rebirth is a word with a more specific, narrower meaning than nativity:

Other hyponyms of nativity include delivery, live birth, posthumous birth, posthumous birth, reincarnation, renascence.

nativity (noun)	rebirth (noun)
the event of being born	a spiritual enlightenment causing a person to lead a new life
	the revival of learning and culture
	a second or new birth
	after death the soul begins a new cycle of existence in another human body