point duty vs United Kingdom of Great Britain and Northern Ireland

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

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

point duty (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
the control of traffic by a policeman stationed at an intersection	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