More rectilinear means more angular or straight, and there are several synonyms that can be used to describe this characteristic. The first synonym is linear, which refers to having straight lines or edges. Another synonym is angular, which describes a sharp, pointed or triangular shape. In addition to these, other synonyms for more rectilinear include geometric, perpendicular, straight-edged and sharp. When designing or describing objects, these synonyms can be useful in communicating the shapes and structures of the item. These synonyms are also helpful when discussing the shape and form of buildings, furniture or other man-made objects that have defined edges and angles.