The term "brainwasher" is often associated with negative connotations, as it refers to someone who manipulates and controls the thoughts and beliefs of others. However, there are several synonyms that can be used to describe this type of behavior, including indoctrinator, mind controller, thought manipulator, and conditioning specialist. Each of these words describes individuals who use various techniques to influence and shape the perspectives of others, often with the intent of gaining power or control over them. While these tactics can be harmful and unethical, it's important to recognize the role that language plays in shaping our understanding and perceptions of such behavior.