Britain vs overall

Britain and overall both are nouns.

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

Britain (noun)	overall (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	(usually plural) work clothing consisting of denim trousers (usually with a bib and shoulder straps)
	a loose protective coverall or smock worn over ordinary clothing for dirty work

Britain (adjective)	overall (adjective)
	involving only main features
	including everything