Jacobin is a term that is often used to refer to a person or group that is radical or extreme in their political beliefs. However, there are many other synonyms for this word that can be used to describe someone with similar beliefs and behaviors. Some of the most common synonyms for Jacobin include revolutionary, extremist, militant, anarchist, and fanatic. Each of these terms suggests a person who is willing to take extreme actions in order to achieve their political goals, often at the expense of others who may disagree with them. Ultimately, while the specific term used to describe someone's political beliefs may vary, the underlying ideas and values are often similar.