U.S. Mint vs United States Mint

U.S. Mint and United States Mint both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S. Mint	Yes	No	No	No
United States Mint	Yes	No	No	No

As nouns, U.S. Mint and United States Mint are synonyms defined as:

U.S. Mint and United States Mint: the mint that manufactures and distributes United States coins for circulation through Federal Reserve Banks; processes gold and silver bullion

Other synonyms of U.S. Mint include US Mint.

U.S. Mint (noun)	United States Mint (noun)
the mint that manufactures and distributes United States coins for circulation through Federal Reserve Banks; processes gold and silver bullion	the mint that manufactures and distributes United States coins for circulation through Federal Reserve Banks; processes gold and silver bullion