Organization of American States vs Republic of Cuba

Organization of American States and Republic of Cuba both are nouns.

Word	Noun	Adjective	Verb	Adverb
Organization of American States	Yes	No	No	No
Republic of Cuba	Yes	No	No	No

Organization of American States (noun)	Republic of Cuba (noun)
an association including most countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation	a communist state in the Caribbean on the island of Cuba