Great Britain vs countenance

Great Britain and countenance both are nouns.

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

Great Britain (noun)	countenance (noun)
an island comprising England and Scotland and Wales	the appearance conveyed by a person's face
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	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
	formal and explicit approval

Great Britain (verb)	countenance (verb)
	consent to, give permission; permit