Republic of Uzbekistan vs Uzbekistan

Republic of Uzbekistan and Uzbekistan both are nouns.

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

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

Republic of Uzbekistan and Uzbekistan: a landlocked republic in west central Asia; formerly an Asian soviet

Other synonyms of Republic of Uzbekistan include Uzbek.

Republic of Uzbekistan (noun)	Uzbekistan (noun)
a landlocked republic in west central Asia; formerly an Asian soviet	a landlocked republic in west central Asia; formerly an Asian soviet