However, there are some synonyms you could use depending on the context:
* At last: This emphasizes the long wait before something happened.
* At long last: Similar to "at last," but even more emphatic.
* Eventually: This implies that something happened after a period of time.
* Ultimately: This suggests that something happened as the ultimate outcome.
* In the end: This indicates that something happened after other things had been considered.
The best synonym for "finally" depends on the specific meaning you want to convey.