United Kingdom of Great Britain and Northern Ireland vs medium wave

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	medium wave (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 radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)