What is a synonym for sharpen?

Here are some synonyms for "sharpen", depending on the context:

General:

* Hone

* Point

* Edge

* Refine

* Enhance

* Improve

* Polish

Specific to tools:

* Grind

* Whet

* Resharpen

Specific to mental abilities:

* Stimulate

* Activate

* Focus

* Concentrate

Specific to senses:

* Amplify

* Intensify

* Exacerbate

The best synonym for "sharpen" will depend on the specific situation and what you are trying to communicate.