St. Vincent and the Grenadines vs Saint Vincent and the Grenadines

St. Vincent and the Grenadines and Saint Vincent and the Grenadines both are nouns.

Word	Noun	Adjective	Verb	Adverb
St. Vincent and the Grenadines	Yes	No	No	No
Saint Vincent and the Grenadines	Yes	No	No	No

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

St. Vincent and the Grenadines and Saint Vincent and the Grenadines: an island country in the central Windward Islands; achieved independence from the United Kingdom in 1979

St. Vincent and the Grenadines (noun)	Saint Vincent and the Grenadines (noun)
an island country in the central Windward Islands; achieved independence from the United Kingdom in 1979	an island country in the central Windward Islands; achieved independence from the United Kingdom in 1979