An anti-riot weapon is a device used for crowd control by security forces or law enforcement agencies. It's designed to disperse, incapacitate, or suppress large groups of people. There are several synonyms that refer to anti-riot weapons. A stun grenade is a type of non-lethal weapon that temporarily blinds and deafens individuals. A tear gas canister is a device that releases a lachrymatory agent, which causes temporary blindness, coughing, and difficulty in breathing. Water cannons are high-pressure devices capable of discharging large volumes of water, and are used to disperse crowds. Rubber bullets are non-lethal projectiles that can cause pain and damage without penetrating the skin. These synonyms give an idea of the various devices that are used in anti-riot situations.