Radioluminescence is a term used to describe the phenomenon where certain materials emit light after being exposed to ionizing radiation. However, there are several synonyms for the term that can be used interchangeably. One of the most common synonyms is radiophosphorescence, which refers to the same process but with an emphasis on the afterglow effect. Another synonym is cathodoluminescence, which describes the light emitted when a material is bombarded with electrons. Similarly, scintillation and fluorescence are also often used as synonyms, although they specifically refer to the emission of light by inorganic crystals and organic molecules, respectively. Overall, while each term may have specific nuances, they all refer to the same fascinating phenomenon of materials emitting light after being exposed to radiation.