Catabolism is a process in which molecules are broken down into smaller parts, releasing energy. It is a fundamental process in the metabolism of living organisms. When cells break down molecules such as carbohydrates, fats, and proteins, energy is released, which the cell can use to perform its functions. There are several other words that can be used as synonyms for catabolism, including degradation, breakdown, decomposition, and disintegration. These words all describe the process of taking apart larger molecules into smaller ones. While catabolism is a necessary process for life, it can also lead to the accumulation of waste products, which must be removed by the body.