United Kingdom vs hard shoulder

United Kingdom and hard shoulder both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom	Yes	No	No	No
hard shoulder	Yes	No	No	No

United Kingdom (noun)	hard shoulder (noun)
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 paved strip beside a motorway (for stopping in emergencies)