Bellicoseness is a term that is often associated with aggression and warlike behavior. If you are looking for synonyms for this word, there are a number of options available. Some common synonyms include belligerence, pugnacity, and militancy. These words all suggest a willingness to fight or engage in conflict. Other synonyms include hostility, aggression, and antagonism, which all suggest a negative attitude or disposition toward others. Depending on the context, you may want to choose a synonym that best fits the situation. Whatever word you choose, it's important to remember that bellicoseness and similar terms are often associated with negative or destructive behavior, so use them with caution.