mod con vs United Kingdom of Great Britain and Northern Ireland

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

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

mod con (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
modern convenience; the appliances and conveniences characteristic of a modern house	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