United Kingdom of Great Britain and Northern Ireland vs hair slide

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	hair slide (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 decorative hinged clip that girls and women put in their hair to hold it in place