General:
* Cordless: This is the most common synonym, specifically referring to the absence of a physical connection.
* Radio: Emphasizes the use of radio waves for transmission.
* Remote: Suggests a lack of physical connection and often implies a distance between the devices.
* Untethered: Emphasizes the freedom of movement without physical constraints.
More Specific:
* Bluetooth: For short-range wireless communication between devices.
* WiFi: For wireless internet connectivity.
* Satellite: For communication via satellites.
* Cellular: For mobile phone communication.
The best synonym depends on the specific situation. For example, "cordless" might be best for a phone, while "WiFi" is more appropriate for internet access.