A flick knife, also known as a switchblade, is a type of knife with a blade that can be opened by pressing a button or lever. It is typically used as a tool for self-defense or as a weapon. However, there are several other synonyms for flick knife that can be used interchangeably. Some examples include switch knife, automatic knife, push-button knife, spring-assisted knife, and gravity knife. Each of these terms is used to describe a specific type of knife with distinct characteristics. Regardless of the synonym used, it is important to remember that these types of knives are often restricted and heavily regulated in many countries.