Electric arc refers to the luminous discharge of electricity generated between two electrodes, and is commonly found in welding, lighting, and electrical equipment. However, there are various synonyms that can be used to describe an electric arc, depending on the context. For example, arc discharge, arc flash, spark discharge, plasma discharge, and electrical discharge are all alternative ways to describe an electric arc. The terms can be used interchangeably, but the context and usage may differ, depending on the application. Some technical industries and scientific fields may have more specific terms, but overall, these synonyms can help to describe and identify an electric arc in different settings.