Britain vs point duty

Britain and point duty both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
point duty	Yes	No	No	No

Britain (noun)	point duty (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	the control of traffic by a policeman stationed at an intersection