United Kingdom of Great Britain and Northern Ireland vs sponge bag

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	sponge bag (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 waterproof bag for holding bathrooms items (soap and toothpaste etc.) when you are travelling