Matthew vs Saint Matthew

Matthew and Saint Matthew both are nouns.

Word	Noun	Adjective	Verb	Adverb
Matthew	Yes	No	No	No
Saint Matthew	Yes	No	No	No

As nouns, Matthew and Saint Matthew are synonyms defined as:

Matthew and Saint Matthew: (New Testament) disciple of Jesus; traditionally considered to be the author of the first Gospel

Other synonyms of Matthew include Levi, Saint Matthew the Apostle, St. Matthew, St. Matthew the Apostle.

Matthew (noun)	Saint Matthew (noun)
one of the Gospels in the New Testament; includes the Sermon on the Mount	(New Testament) disciple of Jesus; traditionally considered to be the author of the first Gospel
(New Testament) disciple of Jesus; traditionally considered to be the author of the first Gospel