Catagenesis refers to the process of biological degradation or decomposition of organic matter. Synonyms for catagenesis include putrefaction, decay, decompose, rot, breakdown, biodegradation, deterioration, spoilage, and fermentation. Putrefaction is often used to describe the decay of animal matter, while fermentation is commonly used for the breakdown of organic material by microorganisms. Decomposition is a broad and general term that applies to all forms of organic matter breakdown. Spoilage and deterioration often refer to the decay and breakdown of food products. In summary, catagenesis and its synonyms are vital biological processes that contribute to the natural cycles of life and death in ecosystems.