What is a synonym for caustic?

Here are some synonyms for "caustic," depending on the context:

For something that burns or corrodes:

* Corrosive

* Abrasive

* Etching

* Biting

* Sharp

* Acidic

For something that is sarcastic or biting:

* Sarcastic

* Acerbic

* Scathing

* Cutting

* Withering

* Mocking

* Ironic

* Cynical

For something that is critical or harsh:

* Critical

* Severe

* Harsh

* Unkind

* Bitter

* Scathing

The best synonym for "caustic" will depend on the specific situation and the nuance you want to convey.