Brunn vs Brno

Brunn and Brno both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brunn	Yes	No	No	No
Brno	Yes	No	No	No

As nouns, Brunn and Brno are synonyms defined as:

Brunn and Brno: an industrial city in Moravia in Czech Republic to the southeast of Prague

Brunn (noun)	Brno (noun)
an industrial city in Moravia in Czech Republic to the southeast of Prague	an industrial city in Moravia in Czech Republic to the southeast of Prague