General Harshness:
* Scathing: This implies biting, sharp criticism.
* Cutting: This suggests comments that are hurtful and emotionally damaging.
* Acerbic: This implies a sour, bitter tone.
* Caustic: This implies biting, sarcastic remarks that can be very damaging.
* Vitriolic: This suggests intensely bitter and poisonous language.
Specificity of Criticism:
* Slanderous: This implies false and damaging remarks intended to harm someone's reputation.
* Abusive: This implies verbally aggressive and offensive comments.
* Insulting: This suggests remarks intended to belittle or offend someone.
* Condemnatory: This suggests strong criticism that disapproves of someone's actions or beliefs.
Other Options:
* Barbs: This is a metaphor for sharp, pointed comments.
* Zingers: This implies witty but hurtful remarks.
* Snide remarks: This suggests comments that are sly and malicious.
The best word to use will depend on the specific context and the level of harshness you want to convey.