Peterburg vs Russia

Peterburg and Russia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Peterburg	Yes	No	No	No
Russia	Yes	No	No	No

Peterburg (noun)	Russia (noun)
a city in the European part of Russia; 2nd largest Russian city; located at the head of the Gulf of Finland; former capital of Russia	a former communist country in eastern Europe and northern Asia; established in 1922; included Russia and 14 other soviet socialist republics (Ukraine and Byelorussia and others); officially dissolved 31 December 1991
	formerly the largest Soviet Socialist Republic in the USSR occupying eastern Europe and northern Asia
	a former empire in eastern Europe and northern Asia created in the 14th century with Moscow as the capital; powerful in the 17th and 18th centuries under Peter the Great and Catherine the Great when Saint Petersburg was the capital; overthrown by revolution in 1917
	a federation in northeastern Europe and northern Asia; formerly Soviet Russia; since 1991 an independent state