Hayastan vs Armenian

Hayastan and Armenian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hayastan	Yes	No	No	No
Armenian	Yes	Yes	No	No

Hayastan (noun)	Armenian (noun)
a landlocked republic in southwestern Asia; formerly an Asian soviet; modern Armenia is but a fragment of ancient Armenia which was one of the world's oldest civilizations; throughout 2500 years the Armenian people have been invaded and oppressed by their neighbors	the Indo-European language spoken predominantly in Armenia, but also in Azerbaijan
	a writing system having an alphabet of 38 letters in which the Armenian language is written
	a native or inhabitant of Armenia

Hayastan (adjective)	Armenian (adjective)
	of or pertaining to Armenia or the people or culture of Armenia