Great Britain vs bagatelle

Great Britain and bagatelle both are nouns.

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

Great Britain (noun)	bagatelle (noun)
an island comprising England and Scotland and Wales	a table game in which short cues are used to knock balls into holes that are guarded by wooden pegs; penalties are incurred if the pegs are knocked over
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	something of little value or significance
	a light piece of music for piano