russian revolution has 2 distinct synonyms spread across 2 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
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
the revolution against the czarist government which led to the abdication of Nicholas II and the creation of a provisional government in March 1917
Synonyms, antonyms and the broader and narrower relations for russian revolution come from Princeton University’s WordNet. Full sources and licences.