General:
* Prolong: To make something last longer.
* Enlarge: To make something bigger in size.
* Expand: To increase in size or scope.
* Augment: To increase or add to something.
* Amplify: To make something larger or more powerful.
Specifically about time:
* Postpone: To delay something.
* Defer: To put something off until a later time.
Specifically about space:
* Elongate: To make something longer.
* Distend: To swell or bulge outwards.
* Protrude: To stick out.
* Project: To extend outwards.
Figuratively:
* Broaden: To make something wider or more inclusive.
* Deepen: To make something more intense or meaningful.
* Reach: To extend to a particular point.
It's important to consider the context of your sentence when choosing the best synonym. For example, "extend" could refer to making something longer, or to offering something to someone.