Kurd vs ethnos

Kurd and ethnos both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kurd	Yes	No	No	No
ethnos	Yes	No	No	No

As nouns, ethnos is a hypernym of Kurd; that is, ethnos is a word with a broader meaning than Kurd:

Kurd: a member of a largely pastoral Islamic people who live in Kurdistan; the largest ethnic group without their own state
ethnos: people of the same race or nationality who share a distinctive culture

Other hypernyms of Kurd include ethnic group, Asian, Asiatic.

Kurd (noun)	ethnos (noun)
a member of a largely pastoral Islamic people who live in Kurdistan; the largest ethnic group without their own state	people of the same race or nationality who share a distinctive culture