playbox vs United Kingdom of Great Britain and Northern Ireland

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

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

playbox (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a box for a child's toys and personal things (especially at a boarding school)	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