The word "arsonist" refers to a person who deliberately sets fire to a property. There are several synonyms for the word arsonist, including pyromaniac, firebug, incendiary, and blaze starter. The term pyromaniac refers to a person who has a compulsive urge to start fires. Meanwhile, the term firebug is used to describe a person who sets small fires for fun or excitement. Similarly, the term incendiary is often used for people who set fire to buildings or vehicles as a means of causing damage. Lastly, the term blaze starter is a commonly used synonym for arsonists who start fires intentionally for a specific reason. It is important to remember that arson is a serious crime and can cause significant damage, injury, or even death.