Olive oil acidity is a term that refers to the level of free fatty acids present in the oil. These acids can impact the flavor and quality of the oil and are used as a measure of its overall quality. While "olive oil acidity" is a commonly used term, there are several synonyms that can refer to the same thing. For example, some people may use the terms "acidity level," "acid content," or "free fatty acid content." Other possible synonyms include "acid number," "acid value," or "percent free acidity." Regardless of the term used, it is important to pay attention to the acidity of your olive oil to ensure you are using a high-quality product.