nativity vs alteration

nativity and alteration both are nouns.

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

As nouns, alteration is a hypernym of nativity; that is, alteration is a word with a broader meaning than nativity:

nativity: the event of being born
alteration: an event that occurs when something passes from one state or phase to another

Other hypernyms of nativity include change, modification.

nativity (noun)	alteration (noun)
the event of being born	the act of revising or altering (involving reconsideration and modification)
	the act of making something different (as e.g. the size of a garment)
	an event that occurs when something passes from one state or phase to another