Arsenite is a term used to refer to compounds made up of arsenic and oxygen, typically in the -3 oxidation state. Some synonyms you could use for arsenite might include: arsenious acid, trivalent arsenic, arsenic trioxide, arsenic (III) oxide, arsenious oxide, and arsenic (III) compounds. Arsenite is often found in contaminated water sources and can pose a serious health risk to humans and animals. It's important to be familiar with these synonyms so that you can accurately identify and communicate the specific compounds you're dealing with, particularly in a scientific or industrial setting.