censure, disparage, reciprocate, scathing
Christina Aguilera disparaged Mariah Carey’s reputation with harsh remarks in an interview in GQ, and Mariah reciprocated with scathing censure of Christina in an interview with Access Hollywood.
disparage - (verb) to speak ill of
reciprocate - (verb) to give in return
scathing - (adjective) bitterly critical
censure - (noun) public or formal expression of disapproval
- Read more about words that mean "verbal attack"