Military Intelligence Section 6 vs Britain

Military Intelligence Section 6 and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Military Intelligence Section 6	Yes	No	No	No
Britain	Yes	No	No	No

Military Intelligence Section 6 (noun)	Britain (noun)
the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas	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