direct-grant school vs Great Britain

direct-grant school and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
direct-grant school	Yes	No	No	No
Great Britain	Yes	No	No	No

direct-grant school (noun)	Great Britain (noun)
formerly a school that charged tuition fees and also received government grants in return for admitting certain non-paying students who were nominated by the local authorities	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