Portcullises are a type of gate that is made of iron bars or wooden slats, and is typically vertical. Other synonyms for portcullises include drawbridges, gates, barricades, barriers, closures, and shutters. These synonyms refer to different types of defensive structures that were used in medieval times to protect cities, castles, and other important buildings from enemy attacks. While portcullises were often used in combination with other defensive measures like walls, moats, and towers, they were often the first line of defense and were extremely effective in keeping out unwanted intruders. Whether you are writing fiction set in a medieval setting or discussing the history of fortifications, it may be useful to know some synonyms for portcullises to help convey your ideas more clearly.