Phosphite is a chemical compound that contains phosphorus in the +3 oxidation state. Some synonyms for the word Phosphite include phosphorous acid, phosphonic acid, and hydrogen phosphite. It is used as a fungicide and fertilizer and plays an essential role in the growth of plants. Phosphites are also used in the development of specialty chemicals, such as pharmaceuticals, flame retardants, and polymers. Moreover, these compounds have unique properties that make them useful in the treatment of many diseases, such as Alzheimer's and cancer. In conclusion, phosphite is an important compound with many synonyms used in various industrial applications and medical fields.