Kyrgyzstan vs Kirghizstan

Kyrgyzstan and Kirghizstan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kyrgyzstan	Yes	No	No	No
Kirghizstan	Yes	No	No	No

As nouns, Kyrgyzstan and Kirghizstan are synonyms defined as:

Kyrgyzstan and Kirghizstan: a landlocked republic in west central Asia bordering on northwestern China; formerly an Asian soviet but became independent in 1991

Other synonyms of Kyrgyzstan include Kirghiz, Kirghizia, Kirgiz, Kirgizia, Kirgizstan, Kyrgyz Republic.

Kyrgyzstan (noun)	Kirghizstan (noun)
a landlocked republic in west central Asia bordering on northwestern China; formerly an Asian soviet but became independent in 1991	a landlocked republic in west central Asia bordering on northwestern China; formerly an Asian soviet but became independent in 1991