Saint Matthew the Apostle vs St. Matthew the Apostle

Saint Matthew the Apostle and St. Matthew the Apostle both are nouns.

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

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

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

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

Saint Matthew the Apostle (noun)	St. Matthew the Apostle (noun)
(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