New York vs N.Y.

New York and N.Y. both are nouns.

Word	Noun	Adjective	Verb	Adverb
New York	Yes	No	No	No
N.Y.	Yes	No	No	No

As nouns, New York and N.Y. are synonyms defined as:

New York and N.Y.: a Mid-Atlantic state; one of the original 13 colonies, with capital Albany

Other synonyms of New York include Empire State, New York State, NY.

New York (noun)	N.Y. (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Albany	a Mid-Atlantic state; one of the original 13 colonies, with capital Albany
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