Cloak-and-dagger men is an archaic term referring to secretive, covert, or clandestine individuals involved in espionage or undercover activities. Synonyms for this term include spies, undercover agents, secret agents, clandestine operatives, intelligence agents, espionage agents, and covert operatives. These words describe people who gather information confidentially or engage in subversive activities without the knowledge of others. Other synonyms for cloak-and-dagger men include shadow warriors, covert operators, undercover detectives, and infiltrators. Whatever the name used, these individuals engage in clandestine operations with the goal of uncovering hidden information, manipulating events, or influencing decisions all while remaining unnoticed.