fire watcher vs United Kingdom of Great Britain and Northern Ireland

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

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

fire watcher (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
(during World War II in Britain) someone whose duty was to watch for fires caused by bombs dropped from the air	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