Britain vs backbench

Britain and backbench both are nouns.

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

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