A cubature unit is a measure of volume that describes the amount of space enclosed by a three-dimensional shape. However, there are other terms that can be used as synonyms for this measurement. One such term is "capacity unit," which is commonly used in relation to the volume of containers like tanks or bottles. Another synonym could be "displacement unit," which is used to measure the volume of an object that is submerged in a fluid. Additionally, "volume unit" is another term that can be used to describe a cubature unit, especially when referring to scientific or mathematical calculations. Regardless of the term used, all of these synonyms refer to the same essential concept of measuring the volume of a three-dimensional space.