Great Britain vs free house

Great Britain and free house both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
free house	Yes	No	No	No

Great Britain (noun)	free house (noun)
an island comprising England and Scotland and Wales	a public house that is not controlled by a brewery and so is free to sell different brands of beer and ale
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