Caustic potash is a common name for potassium hydroxide, which is a strong alkali and finds application in many industrial and laboratory settings.
There are many synonyms to the term "caustic potash", which include lye, potassium hydrate, potash lye, caustic, caustic alkali, and potassium oxide.
Lye is often used as a synonym for potassium hydroxide because it is the traditional name for a strong alkali produced from wood ash. Similarly, potash lye refers to the alkali obtained from potash (potassium carbonate) by an electrolytic process.
The term caustic is used to describe the strong corrosive nature of the chemical, while caustic alkali and potassium oxide refer to its chemical composition.
Overall, there are many synonyms for caustic potash that highlight its important role in chemistry, manufacturing, and research applications.