Siberian vs Chukchi

Siberian and Chukchi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Siberian	Yes	Yes	No	No
Chukchi	Yes	No	No	No

As nouns, Chukchi is a hyponym of Siberian; that is, Chukchi is a word with a more specific, narrower meaning than Siberian:

Siberian (noun)	Chukchi (noun)
a native or inhabitant of Siberia	an indigenous and isolated language of unknown origin spoken by the Chukchi that is pronounced differently by men and women
	a member of an indigenous people living on the Chukchi Peninsula

Siberian (adjective)	Chukchi (adjective)
of or relating to or characteristic of Siberia or the Siberians