Great Britain vs boilers suit

Great Britain and boilers suit both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
boilers suit	Yes	No	No	No

Great Britain (noun)	boilers suit (noun)
an island comprising England and Scotland and Wales	a loose protective coverall or smock worn over ordinary clothing for dirty work
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