Ionic compounds don't end in a specific suffix. Instead, they are named using a system that combines the names of the cation and anion involved.

Here's how it works:

* Cation: The positively charged ion usually keeps its element name.

* Anion: The negatively charged ion typically ends in "-ide".

Examples:

* NaCl: Sodium chloride (Na+ cation + Cl- anion)

* KBr: Potassium bromide (K+ cation + Br- anion)

* CaO: Calcium oxide (Ca2+ cation + O2- anion)

However, there are exceptions:

* Polyatomic ions: These are ions composed of multiple atoms. They have specific names, such as sulfate (SO42-), nitrate (NO3-), and phosphate (PO43-).

Therefore, ionic compounds don't have a universal suffix; their naming depends on the specific cation and anion involved.