Formal:
* Departure: Suitable for formal occasions or when discussing a departure from a place or situation.
* Egress: Used in architectural or legal contexts, emphasizing the act of going out.
* Evacuation: Used when emphasizing the need to leave quickly and safely.
* Exeunt: A theatrical term, indicating the departure of one or more characters from the stage.
Literary:
* Sortie: Implies a quick and decisive departure, often from a besieged place.
* Exodus: A large-scale departure, often from a place of hardship.
* Extrication: Used when emphasizing the difficulty of leaving a situation.
* Vanishment: A dramatic departure that leaves no trace.
Informal:
* Scoot: A quick and informal departure.
* Bolt: A hasty escape.
* Skidaddle: A humorous term for leaving quickly.
Choose the word that best fits the situation and tone of your writing.