fatality rate vs deathrate

fatality rate and deathrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
fatality rate	Yes	No	No	No
deathrate	Yes	No	No	No

As nouns, fatality rate and deathrate are synonyms defined as:

fatality rate and deathrate: the ratio of deaths in an area to the population of that area; expressed per 1000 per year

Other synonyms of fatality rate include death rate, mortality, mortality rate.

fatality rate (noun)	deathrate (noun)
the ratio of deaths in an area to the population of that area; expressed per 1000 per year	the ratio of deaths in an area to the population of that area; expressed per 1000 per year