11-plus vs Great Britain

11-plus and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
11-plus	Yes	No	No	No
Great Britain	Yes	No	No	No

11-plus (noun)	Great Britain (noun)
(formerly in Britain) an examination taken by 11 and 12 year old students to select suitable candidates for grammar school	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