Eupneas is a medical term used to describe a normal, relaxed breathing pattern. There are several synonyms that can be used to describe eupneas, including regular breathing, calm breathing, and even breathing. Breathing is a vital function of the body, and having a consistent and easy breathing pattern is essential to maintaining good health. Other synonyms for eupneas may include natural breathing, relaxed breathing, and effortless breathing. When someone is experiencing eupneas, they may feel a sense of peace and calmness in their body. Overall, eupneas is an important state of being that allows the body to function properly.