The term "power of a reaction" is often used to describe the amount of energy released during a chemical reaction. However, there are several synonyms that can be used to convey a similar meaning. Some of these synonyms include reaction energy, enthalpy change, heat of reaction, and reaction heat. These terms refer to the same concept of the amount of energy released or absorbed during a chemical reaction. It is important to choose the right synonym based on the context in which it is being used. Each of these terms is commonly used in thermodynamics, chemistry, and other related fields, and can help to describe the energy changes that take place in chemical reactions.