plain flour vs Britain

plain flour and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
plain flour	Yes	No	No	No
Britain	Yes	No	No	No

plain flour (noun)	Britain (noun)
flour that does not contain a raising agent	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