Synonyms for Russian Revolution (same or very similar meaning)
WordNet sense 1 (the coup d'etat by the Bolsheviks under Lenin in November 1917 that led to a period of civil war which ended in victory for the Bolsheviks in 1922):
October RevolutionWordNet sense 2 (the revolution against the czarist government which led to the abdication of Nicholas II and the creation of a provisional government in March 1917):
February RevolutionFrom the ODE community, based on WordNetadd/edit