Planimetry, which is the measurement of the area of a two-dimensional figure, has several synonyms that can be used interchangeably. Some examples of synonyms for planimetry include - area measurement, surface measurement, two-dimensional measurement, 2-D measurement, and the calculation of flat surfaces. These terms can be used in various contexts, such as architecture, engineering, mathematics, and surveying. In addition, each of these synonyms has a specific definition that is used to describe the measurement of different types of two-dimensional figures. So, if you are looking for an alternative way to describe planimetry, consider using one of these synonyms to add variety and precision to your writing or conversation.