Alexander III of Russia vs Czar Alexander III

Alexander III of Russia and Czar Alexander III both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alexander III of Russia	Yes	No	No	No
Czar Alexander III	Yes	No	No	No

As nouns, Alexander III of Russia and Czar Alexander III are synonyms defined as:

Alexander III of Russia and Czar Alexander III: son of Alexander II who was czar of Russia (1845-1894)

Other synonyms of Alexander III of Russia include Alexander III.

Alexander III of Russia (noun)	Czar Alexander III (noun)
son of Alexander II who was czar of Russia (1845-1894)	son of Alexander II who was czar of Russia (1845-1894)