General:
* Dist. - This is a common abbreviation used in academic contexts.
* D. - This abbreviation can be used in some situations, but it may be less clear than "Dist."
Specific contexts:
* Difference - This is often used when talking about a distinction between two things.
* Differentiation - This is used when talking about the act of making a distinction.
* Divergence - This is used when talking about a distinction that leads to a separation or difference in direction.
The most suitable short form will depend on the specific situation and the intended meaning.