clever Dick vs Britain

clever Dick and Britain both are nouns.

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

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