Stationary waves refer to a type of wave that appears to stand still while also exhibiting vibrations. These waves are also known as standing waves or harmonic waves. Other synonyms for stationary waves include trapped waves, resonant waves, and node-antinode waves. Trapped waves refer to the phenomenon in which a wave is confined within a space due to the interference of other waves. Resonant waves describe the frequency at which a stationary wave vibrates. Node-antinode waves are a reference to the locations along the wave where the amplitude is at its minimum or maximum, respectively. Regardless of the terminology used, stationary waves are a fascinating and important phenomenon in the study of physics and wave mechanics.