"Coldcocks" is a colloquial term used to describe a sudden, forceful punch. However, there are several other terms that can be used as synonyms for "coldcocks." For example, the word "knockout" is commonly used to describe a powerful punch that knocks someone out. Similarly, the terms "haymaker" and "sucker punch" refer to a punch thrown unexpectedly and with great force. Additionally, the term "right cross" is used to describe a punch thrown with the right hand. While "coldcocks" is a colorful and descriptive term, there are many other words that can be used to convey the same meaning in a more nuanced way.