Acid-base metabolism refers to the way in which the body balances the acidity and alkalinity of bodily fluids. There are several synonyms that can be used to describe this process. One such synonym is acid-base regulation, which refers to the body's ability to maintain a stable pH level. Another synonym is acid-base balance, which refers to the equilibrium between acids and bases in bodily fluids. Acid-base homeostasis is another term that can be used, which describes the body's ability to maintain a stable internal environment. Finally, acid-base equilibrium is a synonym that describes the dynamic balance between acid and base concentrations in the body.