U.S. vs water spaniel

U.S. and water spaniel both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S.	Yes	No	No	No
water spaniel	Yes	No	No	No

U.S. (noun)	water spaniel (noun)
the executive and legislative and judicial branches of the federal government of the United States	any dog of two large curly-coated breeds used for hunting waterfowl
North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776