[{"Bold_text": "noun", "List Items": ["a marking post or tower for guiding aviators, frequently used in races.", "a relatively tall structure at the side of a gate, bridge, or avenue, marking an entrance or approach.", "a monumental tower forming the entrance to an Egyptian temple, consisting either of a pair of tall quadrilateral masonry masses with sloping sides and a doorway between them or of one such mass pierced with a doorway.", "a steel tower or mast carrying high-tension lines, telephone wires, or other cables and lines.", "Aeronautics.a finlike device used to attach engines, auxiliary fuel tanks, bombs, etc., to an aircraft wing or fuselage."]}]