fire watching vs Great Britain

fire watching and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
fire watching	Yes	No	No	No
Great Britain	Yes	No	No	No

fire watching (noun)	Great Britain (noun)
(during World War II in Britain) watching for fires started by bombs that dropped from the sky	an island comprising England and Scotland and Wales
	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