Alexander II of Russia vs Czar Alexander II

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

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

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

Alexander II of Russia and Czar Alexander II: the son of Nicholas I who, as czar of Russia, introduced reforms that included limited emancipation of the serfs (1818-1881)

Other synonyms of Alexander II of Russia include Alexander II, Alexander the Liberator.

Alexander II of Russia (noun)	Czar Alexander II (noun)
the son of Nicholas I who, as czar of Russia, introduced reforms that included limited emancipation of the serfs (1818-1881)	the son of Nicholas I who, as czar of Russia, introduced reforms that included limited emancipation of the serfs (1818-1881)