Nizhni Novgorod vs Nizhnyi Novgorod

Nizhni Novgorod and Nizhnyi Novgorod both are nouns.

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

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

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

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

Nizhni 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