A column is a vertical structure used in architecture and design. A stele is a tall, upright stone slab or PILLAR typically bearing a commemorative inscription or relief design. A FORMATION is an arrangement of people or things acting as a unit. A MONUMENT is a structure built to commemorate a person or event. A BUTTRESS is a structure built against or projecting from a wall for support or reinforcement. A caryatid is a sculpted female figure serving as an architectural support taking the place of a column or a PILLAR. A PILASTER is a shallow, flat, rectangular column that projects only slightly from a wall. A LINE is a long mark made on a surface by a pen, pencil, or brush. A ITEM is a distinct part or element of something. A POST is a long piece of wood, metal, or concrete set firmly in the ground. A SHAFT is a long, narrow part or section forming the handle of a tool or club. A SPINAL is relating to or resembling a spine. A PILLAR is a tall vertical structure of stone, wood, or metal, used as a support for a building or as an ornament.