Euvolemia is a medical term that refers to a normal state of body fluid balance. If you need to find alternative words to describe this state, there are several related terms that may be useful. These include normovolemia, which refers to a normal volume of circulating blood; isotonicity, which describes a state of equal osmotic pressure across a cell membrane; and normohydration, which refers to a state of optimal hydration. Other similar terms include homeostasis, which describes the body's ability to maintain a stable internal environment, and equilibrium, which refers to a state of balance and stability. These terms can be helpful in conveying the concept of euvolemia to patients, colleagues, and others.