UK vs frontbencher

UK and frontbencher both are nouns.

Word	Noun	Adjective	Verb	Adverb
UK	Yes	No	No	No
frontbencher	Yes	No	No	No

UK (noun)	frontbencher (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 member of the House of Commons who is a minister in the government or who holds an official position in an opposition party