pontiff vs Catholic Pope

pontiff and Catholic Pope both are nouns.

Word	Noun	Adjective	Verb	Adverb
pontiff	Yes	No	No	No
Catholic Pope	Yes	No	No	No

As nouns, pontiff and Catholic Pope are synonyms defined as:

Other synonyms of pontiff include Bishop of Rome, Holy Father, pope, Roman Catholic Pope, Vicar of Christ.

pontiff (noun)	Catholic Pope (noun)
the head of the Roman Catholic Church	the head of the Roman Catholic Church