Potassium oxide is a chemical compound that is primarily used in the production of other chemicals and fertilizers. It is an extremely reactive substance and is known to react violently with water. Some other synonyms for potassium oxide include potash, potassium monoxide, and kalium oxide. Potash is perhaps the most commonly used synonym for potassium oxide and is often used in the context of fertilizer production. Potassium monoxide is a more scientific term and is used by researchers and scientists in their work. Kalium oxide is another scientific synonym that is used in the context of chemistry and chemical reactions.