Formal:
* Ceasefire: This is the most common synonym, especially in the context of war or conflict.
* Armistice: This implies a more formal agreement to stop fighting, often as a prelude to negotiations.
* Suspension of hostilities: This is a more general term that can be used in any situation where fighting is temporarily stopped.
Informal:
* Break: This is a simple and straightforward synonym that can be used in a variety of contexts.
* Time-out: This suggests a temporary pause in a disagreement or argument.
* Peace: While not strictly a synonym, "peace" can be used to describe a state of truce.
* Lull: This implies a temporary period of quiet or inactivity.
The best synonym to use will depend on the specific context.