There are many different synonyms for the phrase "at night", each describing the specific time period of darkness when the sun is no longer visible in the sky. Some popular synonyms include "after sunset", "in the evening", "during nighttime", "under the stars", "while it's dark", and "in the wee hours". Other options might include "after dark", "when the moon is out", "during nocturnal hours", or simply "at bedtime". Whatever the specific wording used, these phrases all evoke a sense of quiet mystery and peaceful solitude, as the world outside fades away into the blackness of night.