Concertina wire, also known as razor wire, is a type of barbed wire used in high-security fencing, particularly in military and prison applications. However, there are several synonyms for concertina wire that exist, including spiral barbed wire, helical razor wire, and razor tape. These synonyms are used to describe the same type of fencing, which consists of sharp, pointed barbs that are twisted together in a spiral pattern. Whether you refer to it as concertina wire, spiral barbed wire, helical razor wire, or razor tape, this fencing is designed to be highly effective at deterring intruders and preventing escape.