crossbencher vs Great Britain

crossbencher and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
crossbencher	Yes	No	No	No
Great Britain	Yes	No	No	No

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