Azerbajdzhan vs Azerbaijani Republic

Azerbajdzhan and Azerbaijani Republic both are nouns.

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

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

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

Other synonyms of Azerbajdzhan include Azerbaijan, Azerbajdzhan Republic.

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