estate vs Great Britain

estate and Great Britain both are nouns.

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

estate (noun)	Great Britain (noun)
a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights	an island comprising England and Scotland and Wales
extensive landed property (especially in the country) retained by the owner for his own use	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
everything you own; all of your assets (whether real property or personal property) and liabilities