Republic of Tajikistan vs Tajikistan

Republic of Tajikistan and Tajikistan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Tajikistan	Yes	No	No	No
Tajikistan	Yes	No	No	No

As nouns, Republic of Tajikistan and Tajikistan are synonyms defined as:

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

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

Republic of Tajikistan (noun)	Tajikistan (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