United Kingdom of Great Britain and Northern Ireland vs rota

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	rota (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 roster of names showing the order in which people should perform certain duties