United Kingdom of Great Britain and Northern Ireland vs office-bearer

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	office-bearer (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	the person who holds an office