Britain vs base rate

Britain and base rate both are nouns.

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

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