When two equal and opposite deforming forces are applied parallel to the cross-sectional area of an object, there is relative displacement between the opposite faces of the body. The restoring force per unit area developed due to the applied tangential force is known as tangential stress.
Inter-atomic or inter-molecular forces are electrostatic in nature.
Adhesive force is the attractive force between two unlike molecules. They are caused by forces acting between two substances like electrostatic force (attraction due to opposing charges), mechanical force etc.
E.g., Force of attraction between gum and paper.