"Second Unit" is a filmmaking term that refers to a separate team of crew members who work on specific scenes or shots independently from the main filming unit. However, there are various synonymous expressions that can be used interchangeably to describe this concept. One alternative could be "secondary crew", which highlights their distinction from the main production team. Similarly, the term "auxiliary unit" conveys the assistance provided by this group, while "second team" emphasizes their role as an additional workforce. "Unit B" or "B-unit" are also commonly used phrases, denoting the secondary nature of this crew. Ultimately, these synonyms all refer to the same specialized team responsible for capturing crucial footage in film and television productions.