Tajikistan vs Tadzhikistan

Tajikistan and Tadzhikistan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tajikistan	Yes	No	No	No
Tadzhikistan	Yes	No	No	No

As nouns, Tajikistan and Tadzhikistan are synonyms defined as:

Tajikistan and Tadzhikistan: a landlocked mountainous republic in southeast central Asia to the north of Afghanistan; formerly an Asian soviet

Other synonyms of Tajikistan include Republic of Tajikistan, Tadjik, Tadzhik, Tajik.

Tajikistan (noun)	Tadzhikistan (noun)
a landlocked mountainous republic in southeast central Asia to the north of Afghanistan; formerly an Asian soviet	a landlocked mountainous republic in southeast central Asia to the north of Afghanistan; formerly an Asian soviet