General:
* Enhancing: This emphasizes the process of making something better.
* Better: This is a simple and direct synonym.
* Advancing: This implies progress towards a goal.
* Progressing: This emphasizes a steady movement towards improvement.
More specific:
* Growing: This suggests development and expansion.
* Developing: Similar to growing, but with a focus on skills or abilities.
* Strengthening: This implies making something more robust or resilient.
* Refining: This suggests making something more precise or sophisticated.
Informal:
* Getting better: A casual and straightforward way to express improvement.
* Stepping up: This suggests a noticeable increase in quality or performance.
To choose the best synonym, consider the specific context of the sentence and what aspect of "improving" you want to emphasize.