Britain vs slip carriage

Britain and slip carriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
slip carriage	Yes	No	No	No

Britain (noun)	slip carriage (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	a railway car at the end of the train; it can be detached without stopping the train