question time vs Great Britain

question time and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
question time	Yes	No	No	No
Great Britain	Yes	No	No	No

question time (noun)	Great Britain (noun)
a period during a parliamentary session when members of British Parliament may ask questions of the ministers	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