A gang of cruel robbers can be described using a variety of synonyms. These can include terms like bandits, marauders, plunderers, thieves, looters, and pillagers. These words are often used to describe a group of individuals who work together to commit theft or other illegal activities, often with a disregard for the well-being of their victims. Other potential synonyms might include more colloquial terms like crooks or thugs, or more specific terms such as highwaymen (if the group operates on major roads) or pirates (if their activities are maritime in nature). Whatever the term used, these individuals represent a threat to the safety and security of those around them.