Britain vs castor sugar

Britain and castor sugar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
castor sugar	Yes	No	No	No

Britain (noun)	castor sugar (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	very finely granulated sugar that was formerly sprinkled from a castor