The word photospectroscope refers to an instrument used in the analysis of light and color. While it is a highly specific term, there are a few synonyms that can be used to refer to similar devices. A spectrometer, for example, is a device that measures the various properties of light waves, including their wavelength and intensity. A colorimeter is another similar device that is used for the measurement of color, particularly in the printing industry. Some other potential synonyms for photospectroscope might include photometer, optical spectroscope, and light analyzer. Ultimately, the precise term used will depend on the specific type of device and its intended use.