slate club vs United Kingdom of Great Britain and Northern Ireland

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

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

slate club (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a group of people who save money in a common fund for a specific purpose (usually distributed at Christmas)	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