Britain vs racing circuit

Britain and racing circuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
racing circuit	Yes	No	No	No

Britain (noun)	racing circuit (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 racetrack for automobile races