Chechen vs Russian

Chechen and Russian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chechen	Yes	Yes	No	No
Russian	Yes	Yes	No	No

As nouns, Russian is a hypernym of Chechen; that is, Russian is a word with a broader meaning than Chechen:

Chechen (noun)	Russian (noun)
a northern Caucasian language spoken by the Chechen	the Slavic language that is the official language of Russia
a native or inhabitant of Chechnya	a native or inhabitant of Russia

Chechen (adjective)	Russian (adjective)
of or relating to Chechnya or its people or culture	of or pertaining to or characteristic of Russia or its people or culture or language