Saint Gregory I vs saint

Saint Gregory I and saint both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Gregory I	Yes	No	No	No
saint	Yes	No	Yes	No

Saint Gregory I (noun)	saint (noun)
(Roman Catholic Church) an Italian pope distinguished for his spiritual and temporal leadership; a saint and Doctor of the Church (540?-604)	person of exceptional holiness
	model of excellence or perfection of a kind; one having no equal
	a person who has died and has been declared a saint by canonization

Saint Gregory I (verb)	saint (verb)
	declare (a dead person) to be a saint
	hold sacred