A plasma physicist is a scientist specializing in the study of plasma, a fourth state of matter which includes charged particles and ions. Synonyms for plasma physicist could include: 1. Plasma scientist - a broad term that encompasses researchers studying all aspects of plasma, including its physics, chemistry, and engineering applications. 2. Plasma engineer - a scientist who applies plasma physics to design devices such as plasma torches and fusion reactors. 3. Plasma researcher - a general term that applies to anyone studying plasma, regardless of their specific area of expertise. 4. Plasma physicist engineer - a combination of the two disciplines, referring to a scientist who specializes in the physics and engineering of plasma. 5. Plasma processing specialist - a scientist who studies how plasma interacts with materials, particularly in manufacturing processes such as etching and coating.