Support moment refers to the bending moment at a specific section of a structure that is caused by the reaction forces from the supports. This moment is crucial in determining the stability and strength of a structure, especially in civil engineering. Some of the synonyms for support moment include bending moment, moment of force, torque, and moment of inertia. A bending moment is the tendency of a force to cause a structure to bend, while a moment of force is a rotational force that produces a torque. On the other hand, a moment of inertia refers to a physical property of an object that determines how easily it can be rotated around an axis.