NATO vs United Kingdom of Great Britain and Northern Ireland

NATO and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
NATO	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

NATO (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
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