medical intern vs Britain

medical intern and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
medical intern	Yes	No	No	No
Britain	Yes	No	No	No

medical intern (noun)	Britain (noun)
an advanced student or graduate in medicine gaining supervised practical experience	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