Kirgiz vs Khirghiz

Kirgiz and Khirghiz both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kirgiz	Yes	No	No	No
Khirghiz	Yes	No	No	No

As nouns, Kirgiz and Khirghiz are synonyms defined as:

Other synonyms of Kirgiz include Khirghiz language, Kirghiz, Kirghiz language, Kirgiz language.

As nouns, Kirgiz and Khirghiz are synonyms defined as:

Kirgiz and Khirghiz: a member of a people vast regions of central Siberia

Other synonyms of Kirgiz include Kirghiz.

Kirgiz (noun)	Khirghiz (noun)
the Turkic language spoken by the Kirghiz	the Turkic language spoken by the Kirghiz
a landlocked republic in west central Asia bordering on northwestern China; formerly an Asian soviet but became independent in 1991	a member of a people vast regions of central Siberia
a member of a people vast regions of central Siberia