South Ossetian Republic vs South Ossetia

South Ossetian Republic and South Ossetia both are nouns.

Word	Noun	Adjective	Verb	Adverb
South Ossetian Republic	Yes	No	No	No
South Ossetia	Yes	No	No	No

As nouns, South Ossetian Republic and South Ossetia are synonyms defined as:

South Ossetian Republic and South Ossetia: disputed state in the South Caucasus

Other synonyms of South Ossetian Republic include Republic of South Ossetia.

South Ossetian Republic (noun)	South Ossetia (noun)
disputed state in the South Caucasus	disputed state in the South Caucasus