United Kingdom of Great Britain and Northern Ireland vs council tax

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	council tax (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 tax levied on households by local authorities; based on the estimated value of the property and the number of people living in it