Here are some synonyms for "extraordinary":
* Exceptional
* Remarkable
* Outstanding
* Uncommon
* Exceptional
* Phenomenal
* Amazing
* Spectacular
For example:
* "The athlete's performance was extraordinary."
* "The view from the mountaintop was extraordinary."
* "The scientist made an extraordinary discovery."
It's important to note that "extraordinary" is a subjective term. What one person considers extraordinary, another may not.