Escape velocity refers to the speed at which an object must travel in order to successfully break free from a planet or other celestial body's gravitational pull. There are several synonyms that can be used to describe this phenomenon, including liberation velocity, launch velocity, and departure speed. These terms all describe the same concept, but may be used in different contexts or situations. Other related phrases include escape speed and critical velocity. Understanding these synonyms is important for scientists and engineers working in fields such as space exploration, as they must calculate the necessary escape velocities for spacecraft and other objects in order to successfully launch them into space and navigate them through our solar system and beyond.