General:
* Division: This is a broad synonym that can be used in many situations.
* Separation: Similar to division, but often implies a more distinct or physical separation.
* Distinction: Emphasizes the difference between two things.
* Boundary: Focuses on the line that separates two things.
* Line: Can be used figuratively to represent a dividing line, especially when discussing concepts or ideas.
* Differentiation: Similar to distinction, but implies a more nuanced difference.
More Specific:
* Partition: Used when referring to dividing something into separate parts.
* Segregation: Used when referring to separating groups of people based on some characteristic.
* Delineation: Emphasizes the act of marking or defining a boundary.
* Circumscription: Used when referring to limiting or restricting something.
* Carving: Used when referring to dividing something into separate pieces.
The best synonym to use will depend on the specific context and the desired meaning.