Great Britain vs rod

Great Britain and rod both are nouns.

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

Great Britain (noun)	rod (noun)
an island comprising England and Scotland and Wales	any rod-shaped bacterium
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	a long thin implement made of metal or wood
	a gangster's pistol
	a visual receptor cell that is sensitive to dim light
	a linear measure of 16.5 feet
	a square rod of land