base rate vs Britain

base rate and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
base rate	Yes	No	No	No
Britain	Yes	No	No	No

base rate (noun)	Britain (noun)
the interest rate set by the Bank of England for lending to other banks	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