Tadzhikistan vs Republic of Tajikistan

Tadzhikistan and Republic of Tajikistan both are nouns.

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

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

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

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

Tadzhikistan (noun)	Republic of 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