St. Matthew the Apostle vs Saint Matthew the Apostle

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

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

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

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

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

St. Matthew the Apostle (noun)	Saint 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