What is a synonym for the word indignantly?

Here are some synonyms for "indignantly", depending on the specific nuance you want to convey:

Stronger:

* Furiously

* Wrathfully

* Angrily

* Resentfully

* Scornfully

* Outrageously

* Infuriatedly

More Formal:

* With indignation

* Protestingly

* With righteous anger

* With umbrage

More Mild:

* Displeasedly

* Offendedly

* With disapproval

* With resentment

The best synonym will depend on the context of your sentence.