Photometrical is a term that relates to the measurement of light intensity or brightness. It is often used in the field of physics and optics. However, there are several other words that can be used to describe the same phenomenon. These synonyms include photometric, photometrically, photometry, light measurement, brightness measurement, and luminosity. Each of these words can be used interchangeably with photometrical in the appropriate context. When discussing the intensity of light in a certain area, these synonyms can be incredibly useful to avoid repetition and to keep descriptions fresh and interesting.