"Kirn" is a Scottish word that means "to churn." It is often used to describe the process of churning butter from milk. However, there are many other words that can be used to convey the same message. "Churn" is a common synonym for kirn, as it is also used to describe the process of making butter. Other synonyms include "whisk," "beat," and "stir," which all imply the movement of a tool to mix ingredients together. "Agitate" and "toss" could also be used to describe the action of turning milk or cream into butter. Whatever word is used, the end goal is always the same: delicious, creamy butter.