Space charge can be defined as the charge density of charged particles in a region of space. When discussing the concept of space charge, there are several synonyms that can be used to describe the same phenomenon. For instance, other words that can be used in place of space charge include electric polarization, electrical potential, and electric field. Similarly, terms like plasma sheath, Coulomb force, and ion density can also be used when discussing space charge. Ultimately, all of these words describe the same concept of charged particles that are gathered in a limited space, creating a specific charge density. Understanding the various synonyms of space charge can help individuals better comprehend the concept and its applications in different fields.