Spectroscopical refers to the scientific study of how different types of light interact with matter. There are several synonyms for this word, each of which can be used interchangeably depending on the context. Optical spectroscopy, for instance, is the branch of spectroscopy that deals with visible light and its properties. It is often used to analyze the composition of various materials, including gases, liquids, and solids. Other synonyms for spectroscopical include photonic, photometric, and spectrographic. Each of these terms, like spectroscopical, describes the study of light and its interaction with the physical world in different ways.