crossbencher vs United Kingdom of Great Britain and Northern Ireland

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

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

crossbencher (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a member of the House of Commons who does not vote regularly with either the government or the Opposition	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