Ko Punch, a term used in boxing, refers to a powerful knockout punch that can instantly bring an opponent down to the canvas. There are several synonyms for this term, including knock out punch, power punch, haymaker, and knockout blow. Each of these synonyms refers to a punch that is delivered with full force and can end the fight in just one hit. Other possible synonyms for ko punch include thunder punch, killer punch, one-punch knockout, and jawbreaker. These terms, while different in wording, all convey the same idea of a devastating punch that can put an opponent out of commission in an instant.