Russian Soviet Federative Socialist Republic vs Soviet Russia

Russian Soviet Federative Socialist Republic and Soviet Russia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Russian Soviet Federative Socialist Republic	Yes	No	No	No
Soviet Russia	Yes	No	No	No

As nouns, Russian Soviet Federative Socialist Republic and Soviet Russia are synonyms defined as:

Russian Soviet Federative Socialist Republic and Soviet Russia: formerly the largest Soviet Socialist Republic in the USSR occupying eastern Europe and northern Asia

Other synonyms of Russian Soviet Federative Socialist Republic include Russia, Russian Soviet Federated Socialist Republic.

Russian Soviet Federative Socialist Republic (noun)	Soviet Russia (noun)
formerly the largest Soviet Socialist Republic in the USSR occupying eastern Europe and northern Asia	formerly the largest Soviet Socialist Republic in the USSR occupying eastern Europe and northern Asia