Loudhailers, also known as megaphones, are devices that are used to amplify the sound of a person's voice. However, these devices can be referred to by a number of synonyms that are used interchangeably. Some examples of synonyms for loudhailers include bullhorns, hooters, blowhorns, and shouters. These devices are commonly used in public speaking events, rallies, sports games, and other large gatherings where it is necessary to amplify one's voice. When choosing a loudhailer, it is important to consider factors such as the size and range of the device, its durability, and its ease of use. With the right loudhailer at your disposal, you can deliver your message clearly and effectively to any audience.