Republic of Iceland vs North Atlantic Treaty Organization

Republic of Iceland and North Atlantic Treaty Organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Iceland	Yes	No	No	No
North Atlantic Treaty Organization	Yes	No	No	No

Republic of Iceland (noun)	North Atlantic Treaty Organization (noun)
an island republic on the island of Iceland; became independent of Denmark in 1944	an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security