Artsakh vs Nagorno-Karabakh

Artsakh and Nagorno-Karabakh both are nouns.

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

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

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

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

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