Select the most appropriate synonym of the given word. Caustic

The most appropriate synonym of the word "caustic" is acidic.

• Caustic - able to burn or corrode by chemical action.
• Acidic - having the nature of an acid; capable of turning litmus red.

Both words have a sharp, biting quality. However, "caustic" is more often used to describe a person's words or wit, while "acidic" is more often used to describe a substance's chemical properties.

The other words in the list are not synonyms of "caustic."

• Photogenic - having a pleasing or attractive appearance in photographs.
• Basic - having the nature of a base; capable of turning litmus blue.
• Soothing - having a calming or relaxing effect.