United Kingdom of Great Britain and Northern Ireland vs rub up

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	rub up (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 review that refreshes your memory