New York vs Niagara

New York and Niagara both are nouns.

Word	Noun	Adjective	Verb	Adverb
New York	Yes	No	No	No
Niagara	Yes	No	No	No

New York (noun)	Niagara (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Albany	a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York
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	waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls
one of the British colonies that formed the United States, with capital New York City