infant deathrate vs infant mortality

infant deathrate and infant mortality both are nouns.

Word	Noun	Adjective	Verb	Adverb
infant deathrate	Yes	No	No	No
infant mortality	Yes	No	No	No

As nouns, infant deathrate and infant mortality are synonyms defined as:

infant deathrate and infant mortality: the death rate during the first year of life

Other synonyms of infant deathrate include infant mortality rate.

infant deathrate (noun)	infant mortality (noun)
the death rate during the first year of life	the death rate during the first year of life