St. Vincent vs Saint Vincent

St. Vincent and Saint Vincent both are nouns.

Word	Noun	Adjective	Verb	Adverb
St. Vincent	Yes	No	No	No
Saint Vincent	Yes	No	No	No

As nouns, St. Vincent and Saint Vincent are synonyms defined as:

St. Vincent and Saint Vincent: an island in the center of the Windward Islands; the largest of the islands comprising Saint Vincent and the Grenadines

St. Vincent (noun)	Saint Vincent (noun)
an island in the center of the Windward Islands; the largest of the islands comprising Saint Vincent and the Grenadines	an island in the center of the Windward Islands; the largest of the islands comprising Saint Vincent and the Grenadines