Great Britain vs jobcentre

Great Britain and jobcentre both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
jobcentre	Yes	No	No	No

Great Britain (noun)	jobcentre (noun)
an island comprising England and Scotland and Wales	a government office in a town where information about available jobs is displayed and where unemployment benefits are administered
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