A bathtub is a convenient space to take a relaxing bath and unwind after a long day. However, there are various synonyms for the word "bathtub" that can make your language more rich and descriptive. One alternative term is "soaker tub," which refers to a deep bathtub designed for submerging the entire body. Another term is "spa tub," which usually features jets or other fancy features that simulate a luxurious spa experience. A "clawfoot tub" features ornate feet at the base of the tub and is usually made of cast iron. Finally, a "Jacuzzi" is a brand of hot tub, but it's often used informally as a synonym for any jetted bathtub.