U.S. waters vs territorial waters

U.S. waters and territorial waters both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S. waters	Yes	No	No	No
territorial waters	Yes	No	No	No

U.S. waters (noun)	territorial waters (noun)
territorial waters included within a distance of 12 nautical miles of the coasts of the United States and its territories	the waters surrounding a nation and its territories over which that nation exercises sovereign jurisdiction