bellicose C2+

/ˈbɛlɪˌkoʊs/ inclined to fighting or war; aggressively hostile

revel C2+

/ˈrɛvəl/ to take great pleasure or delight; to celebrate boisterously

belligerency C2+

/bəˈlɪdʒərənsi/ the state of being at war or engaged in hostile conflict