Assayable is a term used to describe substances that can be tested or measured for their quality or purity. Synonyms for assayable include testable, measurable, analyzable, detectable, and quantifiable. These terms are commonly used in laboratory settings to describe the properties of various compounds or substances. Other possible synonyms for assayable might include evaluable, examinable, or verifiable. Essentially, any word that describes a substance's ability to be tested or measured for its properties could be considered a synonym for assayable. As such, it is important for scientists and researchers to have a broad vocabulary of such terms in order to accurately communicate their findings and observations.