Great Britain vs bumf

Great Britain and bumf both are nouns.

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

Great Britain (noun)	bumf (noun)
an island comprising England and Scotland and Wales	reading materials (documents, written information) that you must read and deal with but that you think are extremely boring
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