ultramontanism vs Roman Catholic Church

ultramontanism and Roman Catholic Church both are nouns.

Word	Noun	Adjective	Verb	Adverb
ultramontanism	Yes	No	No	No
Roman Catholic Church	Yes	No	No	No

ultramontanism (noun)	Roman Catholic Church (noun)
(Roman Catholic Church) the policy that the absolute authority of the church should be vested in the pope	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy