Great Britain vs housing estate

Great Britain and housing estate both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
housing estate	Yes	No	No	No

Great Britain (noun)	housing estate (noun)
an island comprising England and Scotland and Wales	a residential area where the houses were all planned and built at the same time
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