Fire bells are a crucial tool in alerting individuals of a fire or emergency situation. However, there are synonyms for this phrase that may be utilized interchangeably, such as fire alarms, signal bells, and smoke detectors. Fire alarms are electronic devices that detect smoke or fire and emit a loud noise to warn inhabitants of potential danger. Signal bells are manual devices that require a person to pull a cord or handle to activate the alarm. Lastly, smoke detectors are electronic devices that use sensors to detect smoke and alert inhabitants of potential fires. Each of these synonyms serves the same purpose, to alert individuals of a potential fire or emergency situation and prevent harm.