Lietuva vs Republic of Lithuania

Lietuva and Republic of Lithuania both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lietuva	Yes	No	No	No
Republic of Lithuania	Yes	No	No	No

As nouns, Lietuva and Republic of Lithuania are synonyms defined as:

Lietuva and Republic of Lithuania: a republic in northeastern Europe on the Baltic Sea, with capital Vilnius

Other synonyms of Lietuva include Lithuania.

Lietuva (noun)	Republic of Lithuania (noun)
a republic in northeastern Europe on the Baltic Sea, with capital Vilnius	a republic in northeastern Europe on the Baltic Sea, with capital Vilnius