fertility vs natality

fertility and natality both are nouns.

Word	Noun	Adjective	Verb	Adverb
fertility	Yes	No	No	No
natality	Yes	No	No	No

As nouns, fertility and natality are synonyms defined as:

fertility and natality: the ratio of live births in an area to the population of that area; expressed per 1000 population per year

Other synonyms of fertility include birth rate, birthrate, fertility rate.

fertility (noun)	natality (noun)
the property of producing abundantly and sustaining vigorous and luxuriant growth	the ratio of live births in an area to the population of that area; expressed per 1000 population per year
the state of being fertile; capable of producing offspring
the ratio of live births in an area to the population of that area; expressed per 1000 population per year