castor sugar vs Britain

castor sugar and Britain both are nouns.

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

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