Gregory vs Church Father

Gregory and Church Father both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gregory	Yes	No	No	No
Church Father	Yes	No	No	No

Gregory (noun)	Church Father (noun)
(Roman Catholic Church) an Italian pope distinguished for his spiritual and temporal leadership; a saint and Doctor of the Church (540?-604)	(Christianity) any of about 70 theologians in the period from the 2nd to the 7th century whose writing established and confirmed official church doctrine; in the Roman Catholic Church some were later declared saints and became Doctor of the Church; the best known Latin Church Fathers are Ambrose, Augustine, Gregory the Great, and Jerome; those who wrote in Greek include Athanasius, Basil, Gregory Nazianzen, and John Chrysostom
the Italian pope who fought to establish the supremacy of the pope over the Roman Catholic Church and the supremacy of the church over the state (1020-1085)
the Italian pope from 1406 to 1415 who worked to end the Great Schism and who retired to make it possible (1327-1417)
the pope who sponsored the introduction of the modern calendar (1572-1585)
Italian pope from 1831 to 1846; conservative in politics and theology; worked to propagate Catholicism in England and the United States (1765-1846)
(Roman Catholic Church) a church father known for his constant fight against perceived heresies; a saint and Doctor of the Church (329-391)