apostolic vs pope

apostolic is not a noun while pope is a noun.

Word	Noun	Adjective	Verb	Adverb
apostolic	No	Yes	No	No
pope	Yes	No	No	No

apostolic (noun)	pope (noun)
	the head of the Roman Catholic Church

apostolic (adjective)	pope (adjective)
of or relating to or deriving from the Apostles or their teachings
proceeding from or ordered by or subject to a pope or the papacy regarded as the successor of the Apostles