backbench vs Britain

backbench and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
backbench	Yes	No	No	No
Britain	Yes	No	No	No

backbench (noun)	Britain (noun)
any of the seats occupied by backbenchers in the House of Commons	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