There are a variety of synonyms for the term "fire-extinguishing system" that can be used to describe systems designed to control and suppress fires. Some of the most common synonyms include fire suppression systems, fire protection systems, fire safety systems, and fire control systems. Other possible synonyms include fire fighting systems, fire suppression equipment, fire sprinkler systems, and fire alarm systems. Additionally, there are specific types of fire-extinguishing systems that may have their own unique synonyms, such as carbon dioxide suppression systems, foam suppression systems, and dry chemical suppression systems. All of these systems are designed to protect buildings and people from the dangers of fire, and provide critical support in emergency situations.