What is a synonym for exceptionally?

Here are some synonyms for "exceptionally", depending on the context and the nuance you want to convey:

Formal:

* Remarkably

* Extraordinarily

* Unusually

* Outstandingly

* Eminently

* Significantly

* Signally

* Particularly

* Specially

* Exceedingly

Informal:

* Really

* Truly

* Very

* Incredibly

* Amazingly

* Superbly

Other options:

* Above and beyond

* Out of the ordinary

* Beyond compare

* In a class of its own

The best synonym will depend on the specific sentence and the desired effect.