Here's why:
* Expedite: To make something happen faster or sooner.
* Hasten: To speed up or accelerate a process.
Both words imply a sense of urgency and the desire to quicken a process.
Here are some other words that can be similar in meaning to expedite:
* Accelerate
* Speed up
* Rush
* Fast-track
* Dispatch
* Promote (in the sense of advancing something)