Alexander the Liberator vs Alexander II of Russia

Alexander the Liberator and Alexander II of Russia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alexander the Liberator	Yes	No	No	No
Alexander II of Russia	Yes	No	No	No

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

Alexander the Liberator and Alexander II of Russia: 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 the Liberator include Alexander II, Czar Alexander II.

Alexander the Liberator (noun)	Alexander II of Russia (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)