sweet Fanny Adams vs United Kingdom of Great Britain and Northern Ireland

sweet Fanny Adams and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet Fanny Adams	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

sweet Fanny Adams (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
little or nothing at all	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