Architecture Terms – C A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Photo by Ricardo Gomez Angel, via Unsplash CantileverA part of a building structure supported on one end. Photo by Antonio Gabola, via Unsplash Chicago WindowA wide window with two additional narrow sash windows. Mattana, CC BY-SA 3.0, via Wikimedia Commons Clustered ColumnColumns that are grouped together and physically connected to act as one structure. Photo by Семён Ельницкий, via Unsplash ColumnA piece of structure that lies vertically, often to support a beam. Photo by Michaela Murphy, via Unsplash CorniceThe decorative molding at the top of a building that projects out.