Azerbaijani Republic vs Azerbajdzhan Republic

Azerbaijani Republic and Azerbajdzhan Republic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Azerbaijani Republic	Yes	No	No	No
Azerbajdzhan Republic	Yes	No	No	No

As nouns, Azerbaijani Republic and Azerbajdzhan Republic are synonyms defined as:

Azerbaijani Republic and Azerbajdzhan Republic: a landlocked republic in southwestern Asia; formerly an Asian soviet

Other synonyms of Azerbaijani Republic include Azerbaijan, Azerbajdzhan.

Azerbaijani Republic (noun)	Azerbajdzhan Republic (noun)
a landlocked republic in southwestern Asia; formerly an Asian soviet	a landlocked republic in southwestern Asia; formerly an Asian soviet