visual display unit vs Britain

visual display unit and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
visual display unit	Yes	No	No	No
Britain	Yes	No	No	No

visual display unit (noun)	Britain (noun)
(British) British term for video display	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