Here are some other words that can be used to express a degree of difference:
* Disparity: A significant difference in size, amount, or quality.
* Discrepancy: A difference or inconsistency between two or more things that should be the same.
* Deviation: A departure or difference from a standard, norm, or expected value.
* Divergence: The act or process of moving apart or becoming different.
* Differentiation: The act or process of becoming different or distinct.
The best word to use will depend on the specific context.