Fire plug is one of the commonly used terms for a fire hydrant, which is an essential component of the underground water supply system for firefighters. However, there are a few other synonyms that you may come across, such as fire plugger, fire valve, and fire hydrant outlet. Similarly, some regions may also refer to it as the firecock, steamer, or fire pump. These synonyms are used interchangeably, but they essentially serve the same purpose. Consequently, they all play a crucial role in facilitating the firefighters' tasks, helping them contain and control fires quickly and effectively.