When it comes to sedatives, there are a variety of synonyms that can be used to describe them. Some of the most common synonyms include tranquilizers, sleeping pills, hypnotics, anxiolytics, and depressants. These terms all refer to substances or medications that are used to help calm the mind or promote sleep. Other, less common synonyms for sedatives include relaxants, anticonvulsants, and muscle relaxants. No matter what term you use to refer to these types of substances, it's important to use them only as directed by a healthcare professional, as they can be addictive and potentially dangerous.