S: (n) straight line (a line traced by a point traveling in a constant direction; a line of zero curvature) "the shortest distance between two points is a straight line"
S: (n) line (a length (straight or curved) without breadth or thickness; the trace of a moving point)
S: (n) shape, form (the spatial arrangement of something as distinct from its substance) "geometry is the mathematical science of shape"
S: (n) attribute (an abstraction belonging to or characteristic of an entity)