Definition of aggression:
rush, onset, riotousness, bloodletting, disputatiousness, pugnacity, temper, trespass, intrusion, quarrelsomeness, belligerence, pushiness, hostility, tanning, counterattack, attempt, militancy, resentment, anger, antagonism, blood, infringement, assailment, salvo, blitz, brutality, blitzkrieg, asperity, swoop, push, incursion, forcefulness, combativeness, militantness, truculence, onrush, feistiness, rage, irritation, pounding, belligerency, assaultiveness, coup de main, trouble, aggressiveness, enmity, contentiousness, outrage, mood, encroachment, ill will, militarism, bloodbath, descent, bellicosity, militance, annoyance, scrappiness, defiance.
- attack (part of speech: noun)
- warfare (part of speech: noun)
- "The History of the Peloponnesian War", Thucydides.
Its tendency to produce aggression on the laws and rights of other nations and to endanger the peace of our own is so obvious that I doubt not you will adopt measures for restraining it effectually in future.- "State of the Union Addresses of Thomas Jefferson", Thomas Jefferson.
- "Project Gutenberg History of The Netherlands, 1555-1623, Complete", John Lothrop Motley.