Cruel, bitter criticism (7)

I believe the answer is:

vitriol

(Other definitions for vitriol that I've seen before include "Abusive language - sulphuric acid" , "Caustic words" , "Scathing criticism - sulphuric acid" , "Acid -- caustic writings" , "Sulphuric acid and hateful criticism" .)

I've seen this clue in the King Feature Syndicate.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.