Closed doors are often used to describe a situation where communication or information is restricted. Synonyms for this term include 'behind the scenes', 'privately', 'secretly', 'in private', 'furtively', 'under cover', 'covertly', 'clandestinely', 'in camera', 'confidentially' and 'in confidence'. These words all convey a sense of secrecy or exclusivity, suggesting that the information being kept confidential is sensitive or important. Closed doors can create an air of mystery and intrigue, and can lead to speculation and rumours among those who are excluded from the conversation. However, when used judiciously, they can also be a way to protect private information and prevent unnecessary public scrutiny.