The crossword solution for the term 'CAPACITY SUFFIX' is 'LITER'. The term 'liter' is a unit of measurement used to measure capacity, volume, or mass. It is often used to measure liquids, such as water, and is equal to one cubic decimeter. It is also used to measure the capacity of containers, such as bottles and cans. In some countries, it is also used to measure the mass of certain items, such as food.