"Coup de grace" is a French term that means the final blow or the finishing move. It is generally used in reference to putting an end to a conflict or situation in a single decisive action. Some synonyms for this term include "finishing blow," "deathblow," or "final stroke." Other variations of this term might include "clincher," "knockout punch," or "game changer." "Coup de grâce" can also be used to refer to a merciful end to someone's suffering or to describe something that ends a stalemate. In any case, these synonyms all point to a decisive and final action that brings closure to a situation.