aggro vs United Kingdom of Great Britain and Northern Ireland

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

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

aggro (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
(informal British usage) aggravation or aggression	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