invigilation vs United Kingdom of Great Britain and Northern Ireland

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

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

invigilation (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
keeping watch over examination candidates to prevent cheating	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