postulator vs Roman Catholic

postulator and Roman Catholic both are nouns.

Word	Noun	Adjective	Verb	Adverb
postulator	Yes	No	No	No
Roman Catholic	Yes	Yes	No	No

postulator (noun)	Roman Catholic (noun)
someone who assumes or takes something for granted as the basis of an argument	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy
(Roman Catholic Church) someone who proposes or pleads for a candidate for beatification or canonization	a member of the Roman Catholic Church

postulator (adjective)	Roman Catholic (adjective)
	of or relating to or supporting Romanism