Great Britain vs tea parlour

Great Britain and tea parlour both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
tea parlour	Yes	No	No	No

Great Britain (noun)	tea parlour (noun)
an island comprising England and Scotland and Wales	a restaurant where tea and light meals are available
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