The term 'BOLSHEVIK's Foe' can be summarized by four crossword solutions: CZAR (4 letters), TSAR (4 letters), Tzar (4 letters), and Tsarist (7 letters). CZAR, TSAR, and Tzar are all titles used to refer to the monarch of Russia from the 16th century until the Russian Revolution in 1917. TSAR is the most commonly used title, derived from the Latin word Caesar, meaning emperor. Tsarist refers to the system of government in Russia before the revolution, which was ruled by the TSAR.