Saint Peter vs saint

Saint Peter and saint both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Peter	Yes	No	No	No
saint	Yes	No	Yes	No

Saint Peter (noun)	saint (noun)
disciple of Jesus and leader of the Apostles; regarded by Catholics as the vicar of Christ on earth and first Pope	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 Peter (verb)	saint (verb)
	declare (a dead person) to be a saint
	hold sacred