Holy Father vs Roman Catholic Pope

Holy Father and Roman Catholic Pope both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holy Father	Yes	No	No	No
Roman Catholic Pope	Yes	No	No	No

As nouns, Holy Father and Roman Catholic Pope are synonyms defined as:

Holy Father and Roman Catholic Pope: the head of the Roman Catholic Church

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

Holy Father (noun)	Roman Catholic Pope (noun)
the head of the Roman Catholic Church	the head of the Roman Catholic Church