bottle bank vs U.K.

bottle bank and U.K. both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottle bank	Yes	No	No	No
U.K.	Yes	No	No	No

bottle bank (noun)	U.K. (noun)
a place where bottles can be deposited for recycling	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