There are many synonyms that can be used for the phrase "twelve o'clock at night". Some of these synonyms include midnight, witching hour, dead of night, the wee hours, witching time, the darkest hour, and the middle of the night. Each of these synonyms can be used to describe the time when most people are usually asleep and darkness prevails. Midnight is the most commonly used synonym and refers to the middle of the night when the clock strikes twelve. The witching hour is often used in literature and movies to describe the time when supernatural activity is believed to occur.