Victoria plum vs Britain

Victoria plum and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Victoria plum	Yes	No	No	No
Britain	Yes	No	No	No

Victoria plum (noun)	Britain (noun)
a large red plum served as dessert	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