United Kingdom of Great Britain and Northern Ireland vs derv

United Kingdom of Great Britain and Northern Ireland and derv both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
derv	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	derv (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	diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle)