Master stroke, a term commonly used to refer to an impressive action or strategy, has several synonyms. One such synonym is coup, which is a French word for a sudden, brilliant maneuver or accomplishment. Another synonym is tour de force, a French idiom that means a display of exceptional skill, talent, or ability. A third synonym is stroke of genius, which usually refers to a creative or brilliant idea that leads to an impressive accomplishment. An impressive strategy or move can also be described as a game-changer, a decisive move that alters the direction of the situation. These synonyms help to convey the same sense of awe and admiration as the term "master stroke".