New York vs East River

New York and East River both are nouns.

Word	Noun	Adjective	Verb	Adverb
New York	Yes	No	No	No
East River	Yes	No	No	No

New York (noun)	East River (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Albany	a tidal strait separating Manhattan and the Bronx from Queens and Brooklyn
the largest city in New York State and in the United States; located in southeastern New York at the mouth of the Hudson river; a major financial and cultural center
one of the British colonies that formed the United States, with capital New York City