General:
* Prolonged: This synonym emphasizes the duration of something.
* Lengthened: Similar to "prolonged", this emphasizes the increase in length.
* Expanded: This suggests a wider scope or range.
* Augmented: This means increased in size or amount.
Specific:
* Broadened: This applies to a range of knowledge or understanding.
* Enlarged: This is used for physical size.
* Amplified: This is used for sound or signals.
* Delayed: This applies to time.
Other:
* Elaborated: This implies a more detailed explanation.
* Extra: This indicates something additional or more than usual.
To choose the best synonym, consider the specific meaning of "extended" in your context.