The term 'Moving in Waves' can be described by the 8-letter word 'Rippling'. Rippling is a term used to describe the movement of water or air in a series of waves. It is often used to describe the motion of a body of water, such as an ocean or lake, when it is disturbed by a force such as wind or a rock being thrown into it. It can also be used to describe the movement of air, such as when a gust of wind passes through a field of grass. In both cases, the movement of the water or air is characterized by a series of waves that move outward from the point of disturbance.