Saint Nicholas vs saint

Saint Nicholas and saint both are nouns.

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

Saint Nicholas (noun)	saint (noun)
a bishop in Asia Minor who is associated with Santa Claus (4th century)	person of exceptional holiness
the legendary patron saint of children; an imaginary being who is thought to bring presents to children at Christmas	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 Nicholas (verb)	saint (verb)
	declare (a dead person) to be a saint
	hold sacred