Saint Vincent and the Grenadines vs Windward Islands

Saint Vincent and the Grenadines and Windward Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Vincent and the Grenadines	Yes	No	No	No
Windward Islands	Yes	No	No	No

Saint Vincent and the Grenadines (noun)	Windward Islands (noun)
an island country in the central Windward Islands; achieved independence from the United Kingdom in 1979	a group of islands in the southeastern West Indies; the southern part of the Lesser Antilles