Normal pressure force, also known as perpendicular force, is a type of force that is exerted by an object perpendicular to the surface it's resting on. Some synonyms for normal pressure force include normal force, ground reaction force, contact force, and vertical force. While these terms are all technically interchangeable, they may carry slightly different connotations depending on the context in which they are used. Normal pressure force is an essential concept in physics and plays an important role in understanding the motion of objects on flat surfaces. Understanding the synonyms for normal pressure force can help to clarify concepts, improve communication, and aid in problem-solving.