The term 'emit light' can be described by four different crossword solutions: RADIATE (7 letters), lase (4 letters), SHINE (5 letters), and lightup (7 letters). RADIATE means to send out energy or light in all directions, while lase is a type of radiation that is created by stimulating atoms with an external source of energy. SHINE is a verb meaning to emit or reflect light, and lightup is another way of saying to turn on a light. All of these words describe the action of emitting light.