The word "fulminates" means to express strong criticism or to make a vehement verbal attack on something or someone. However, there are several synonyms that can be used to convey a similar meaning. One alternative might be "condemns," which suggests a strong disapproval of someone's actions or statements. Another synonym for fulminates might be "castigates," which implies a punishment for wrongdoing and can be used in a similar context. Alternatively, "denounces" can be used to describe a forceful expression of disapproval, while "censures" suggests a more official rebuke or reprimand. Whatever synonym is used, it is clear that the speaker is expressing a strong negative opinion or condemning someone's behavior.