saint vs Saint Nicholas

saint and Saint Nicholas both are nouns.

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

saint (noun)	Saint Nicholas (noun)
person of exceptional holiness	a bishop in Asia Minor who is associated with Santa Claus (4th century)
model of excellence or perfection of a kind; one having no equal	the legendary patron saint of children; an imaginary being who is thought to bring presents to children at Christmas
a person who has died and has been declared a saint by canonization

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