United Kingdom of Great Britain and Northern Ireland vs estate

United Kingdom of Great Britain and Northern Ireland and estate both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
estate	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	estate (noun)
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	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
	extensive landed property (especially in the country) retained by the owner for his own use
	everything you own; all of your assets (whether real property or personal property) and liabilities