An organic catalyst is a substance that can increase the rate of a chemical reaction without undergoing any permanent chemical changes itself. There are several synonyms for the term "organic catalyst" that are commonly used in the field of chemistry. Some of these include biocatalyst, enzyme, natural catalyst, and biochemical accelerator. All of these terms refer to a substance that can accelerate a chemical reaction by providing an alternate pathway with lower activation energy. Enzymes are the most common type of organic catalyst, as they are found in living organisms and play a crucial role in metabolic pathways. Biocatalysts and natural catalysts may also refer to enzymes, while biochemical accelerators may refer to any organic catalyst that increases the rate of a biochemical reaction.