doorknob vs Great Britain

doorknob and Great Britain both are nouns.

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

doorknob (noun)	Great Britain (noun)
a knob used to release the catch when opening a door (often called `doorhandle' in Great Britain)	an island comprising England and Scotland and Wales
	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