Nagorno-Karabakh vs Artsakh

Nagorno-Karabakh and Artsakh both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nagorno-Karabakh	Yes	No	No	No
Artsakh	Yes	No	No	No

As nouns, Nagorno-Karabakh and Artsakh are synonyms defined as:

Nagorno-Karabakh and Artsakh: unrecognized de-facto state in South Caucasus

Other synonyms of Nagorno-Karabakh include Nagorno-Karabakh Republic, Republic of Artsakh.

Nagorno-Karabakh (noun)	Artsakh (noun)
unrecognized de-facto state in South Caucasus	unrecognized de-facto state in South Caucasus