primate vs archpriest

primate and archpriest both are nouns.

Word	Noun	Adjective	Verb	Adverb
primate	Yes	No	No	No
archpriest	Yes	No	No	No

As nouns, primate and archpriest are synonyms defined as:

Other synonyms of primate include hierarch, high priest, prelate.

primate (noun)	archpriest (noun)
any placental mammal of the order Primates; has good eyesight and flexible hands and feet	a senior clergyman and dignitary
a senior clergyman and dignitary