infant deathrate vs infant mortality rate

infant deathrate and infant mortality rate both are nouns.

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

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

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

Other synonyms of infant deathrate include infant mortality.

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