St. James vs Saint James the Apostle

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

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

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

St. James and Saint James the Apostle: (New Testament) disciple of Jesus; brother of John; author of the Epistle of James in the New Testament

Other synonyms of St. James include James, Saint James, St. James the Apostle.

St. James (noun)	Saint James the Apostle (noun)
(New Testament) disciple of Jesus; brother of John; author of the Epistle of James in the New Testament	(New Testament) disciple of Jesus; brother of John; author of the Epistle of James in the New Testament