OAS vs Saint Vincent and the Grenadines

OAS and Saint Vincent and the Grenadines both are nouns.

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

OAS (noun)	Saint Vincent and the Grenadines (noun)
an association including most countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation	an island country in the central Windward Islands; achieved independence from the United Kingdom in 1979