cardinalate vs Church of Rome

cardinalate and Church of Rome both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardinalate	Yes	No	No	No
Church of Rome	Yes	No	No	No

cardinalate (noun)	Church of Rome (noun)
the office of cardinal	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy
(Roman Catholic Church) the body of all cardinals of the church; elects and advises the pope