#hostility

• Aggressiveness — A character trait, psychological state, or native/acquired destructive tendency, manifested by the inclination to attack, use violence, or impose dominance over others. In ethology, it represents an instinctive biological survival mechanism used by animals to defend territory, obtain food, or establish group hierarchy.
• Animosity — A feeling of hostility, deep antipathy, hidden hatred, or resentment steadily manifested between two or more persons or social groups. This behavioral phenomenon translates into heightened interpersonal tensions, frequent disputes, and a structural psychological resistance to any attempt at reconciliation or harmonious communication.
• Antagonism — A diametrical, irreconcilable, and deeply intense opposition between two mutually exclusive forces, ideas, interests, or tendencies. In biology and pharmacology, the term denotes the interaction between two substances, organisms, or anatomical structures in which the action of one counteracts, diminishes, or completely inhibits the other.