Constructive interference is a phenomenon in which two waves merge into a single wave with a greater amplitude than either of the individual waves. This effect can also be known as reinforcement or additive interference. Other synonyms for constructive interference include positive interference, co-phase addition, and superposition. In contrast, the opposite effect of destructive interference occurs when two waves cancel each other out, resulting in a reduced or zero amplitude. Synonyms for destructive interference include negative interference, co-phase subtraction, and antiphase subtraction. Understanding the concepts of constructive and destructive interference is important in fields such as acoustics, optics, and engineering, as they can greatly impact the behavior of waves and signals.