play-box vs United Kingdom of Great Britain and Northern Ireland

play-box and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
play-box	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

play-box (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