General:
* Change - This is the most common and general word.
* Modification - This implies a change made to something existing.
* Adjustment - This suggests a minor change made to improve something.
* Amendment - This is often used for changes to legal documents.
* Revision - This implies a change made to improve something, often a written work.
Specific:
* Adaptation - This refers to a change made to suit a new purpose or environment.
* Transformation - This implies a significant change that completely alters something.
* Conversion - This refers to a change in form or function.
* Alteration - This is a more formal word that can be used in many contexts.
Informal:
* Tweak - This implies a small change or adjustment.
* Fix - This suggests a change made to correct a problem.
* Overhaul - This refers to a major change that involves many parts.
It's important to consider the context of your writing to choose the most appropriate word. For example, if you're talking about a change to a law, "amendment" would be the best choice. If you're talking about a small change to a piece of clothing, "alteration" would be appropriate.