damage, impairment, harm - the occurrence of a change for the worse

warping, warp - a moral or mental distortion

alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"

shear - (physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselves; "the shear changed the quadrilateral into a parallelogram"

strain - (physics) deformation of a physical body under the action of applied forces

change of shape - an action that changes the shape of something