Normal saline is a commonly used term in medical terminology, referring to a solution of 0.9% salt in water which is isotonic with human blood. However, there are other synonyms for this term that can also be used, depending on the context in which it's being used. Some of the most commonly used synonyms for normal saline include physiological saline, isotonic saline, and balanced salt solution. These terms are all used to describe the same or similar solutions that are made up of a specific composition of salt and water that is intended to mimic the body's own fluid composition. Whether you refer to it as normal saline, physiological saline, or isotonic saline, these solutions play an essential role in many aspects of modern medicine.