Matthew vs St. Matthew the Apostle

Matthew and St. Matthew the Apostle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Matthew	Yes	No	No	No
St. Matthew the Apostle	Yes	No	No	No

As nouns, Matthew and St. Matthew the Apostle are synonyms defined as:

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

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

Matthew (noun)	St. Matthew the Apostle (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