United Kingdom of Great Britain and Northern Ireland vs life office

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	life office (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	life assurance office