Thomas Becket vs Roman Catholic

Thomas Becket and Roman Catholic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Thomas Becket	Yes	No	No	No
Roman Catholic	Yes	Yes	No	No

Thomas Becket (noun)	Roman Catholic (noun)
(Roman Catholic Church) archbishop of Canterbury from 1162 to 1170; murdered following his opposition to Henry II's attempts to control the clergy (1118-1170)	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy
	a member of the Roman Catholic Church

Thomas Becket (adjective)	Roman Catholic (adjective)
	of or relating to or supporting Romanism