topping vs United Kingdom of Great Britain and Northern Ireland

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

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

topping (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a flavorful addition on top of a dish	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

topping (adjective)	United Kingdom of Great Britain and Northern Ireland (adjective)
excellent; best possible