Britain vs clever Dick

Britain and clever Dick both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
clever Dick	Yes	No	No	No

Britain (noun)	clever Dick (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	an intellectual who is ostentatiously and irritatingly knowledgeable