U.K. vs don

U.K. and don both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.K.	Yes	No	No	No
don	Yes	No	Yes	No

U.K. (noun)	don (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	teacher at a university or college (especially at Cambridge or Oxford)
	the head of an organized crime family

U.K. (verb)	don (verb)
	put clothing on one's body