hair slide vs United Kingdom of Great Britain and Northern Ireland

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

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

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