Ionic compounds are not known as saline. "Saline" refers specifically to sodium chloride (NaCl), which is a common ionic compound found in salt.

Here's why the terms aren't interchangeable:

* Ionic compounds: These are compounds formed by the electrostatic attraction between oppositely charged ions. There are many different ionic compounds, including:

* Sodium chloride (NaCl)

* Potassium chloride (KCl)

* Calcium carbonate (CaCO3)

* Magnesium oxide (MgO)

* Saline: This refers specifically to a solution containing sodium chloride (NaCl). It's often used in medical contexts, like saline solution for IVs or contact lens solutions.

In summary:

* Saline is a specific type of solution containing sodium chloride.

* Ionic compounds are a broader category of compounds that include sodium chloride but also many others.