A metaphor is a figurative language device that represents one thing as if it were another, or compares two things not normally viewed as similar, such as time is a thief. This comparison draws attention to the way time is quick and stealthy. Simile
Velocity is the rate of motion, speed or action. An example of velocity is a car driving at 75 miles per hour. velocity. pl. velocity. pl. Rapidity or speed of motion; swiftness. Physics A vector quantity whose magnitude is a body's speed and whose direction is the body's direction of motion.
Velocity is a vector quantity, the rate at which an object changes it's position. The speed calculation formula is: Speed = Distance / Time. Speed unit in SI system is meters per second (mps). Other common units are miles per hour (mph) and kilometers per hour (kph).