Great Britain vs North Atlantic Treaty Organization

Great Britain and North Atlantic Treaty Organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
North Atlantic Treaty Organization	Yes	No	No	No

Great Britain (noun)	North Atlantic Treaty Organization (noun)
an island comprising England and Scotland and Wales	an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security
a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom