The term "Sunday Punch" is often used to describe a powerful and decisive blow, typically delivered in boxing. Synonyms for this phrase include "knockout punch", "finishing blow", "coup de grâce" and "clinch". These terms all describe a final and definitive strike that ends the match or settles the matter at hand. Other related phrases include "one-two punch" and "haymaker", which imply a rapid succession of powerful blows. Overall, these synonyms for "Sunday Punch" emphasize the importance of a decisive and impactful strike in combat or competition.