Nizhny Novgorod vs Nizhnyi Novgorod

Nizhny Novgorod and Nizhnyi Novgorod both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nizhny Novgorod	Yes	No	No	No
Nizhnyi Novgorod	Yes	No	No	No

As nouns, Nizhny Novgorod and Nizhnyi Novgorod are synonyms defined as:

Nizhny Novgorod and Nizhnyi Novgorod: an industrial city in the European part of Russia; birthplace of Maksim Gorky

Other synonyms of Nizhny Novgorod include Gorki, Gorkiy, Gorky, Nizhni Novgorod.

Nizhny Novgorod (noun)	Nizhnyi Novgorod (noun)
an industrial city in the European part of Russia; birthplace of Maksim Gorky	an industrial city in the European part of Russia; birthplace of Maksim Gorky