There are several synonyms for the term "directional signal." One common synonym is "turn signal," which refers to the device on a vehicle that indicates a change in direction, typically by flashing a light on the appropriate side of the vehicle. Another synonym is "indicator," which can refer to any device that signals a change in direction or status, such as a dashboard light that indicates a low fuel level. "Blinker" is another synonym for a directional signal, which is derived from the fact that the signal typically involves flashing or blinking lights. Other possible synonyms for a directional signal might include "flasher," "hive," or "indicator light".