Progress/Development:
* Sophisticated
* Progressive
* Cutting-edge
* State-of-the-art
* Modern
* High-tech
* High-level
* Up-to-date
* Developed
* Evolved
* Mature
Difficulty/Complexity:
* Difficult
* Challenging
* Complex
* Intricate
* Sophisticated
Time/Stage:
* Later
* Further
* Subsequent
* Future
Other:
* Superior
* Expert
* Skilled
* Proficient
* Experienced
Example:
* "The company's advanced technology is a key competitive advantage." (Sophisticated)
* "This is an advanced course for students who have already mastered the basics." (Difficult)
* "The project is in its advanced stages." (Later)
Choosing the right synonym depends on the specific nuance you want to convey.