UK vs North Atlantic Treaty Organization

UK and North Atlantic Treaty Organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
UK	Yes	No	No	No
North Atlantic Treaty Organization	Yes	No	No	No

UK (noun)	North Atlantic Treaty Organization (noun)
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	an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security