ANTAGONISM
Active Antagonism
Attack. –N. assault, onset, onslaught, charge, aggression, drive, offence, incursion, inroad, invasion, irruption, outbreak, raid, foray, fun at, dead set at, storming boarding, siege, investment, obsession, bombardment, cannonade, air raid, fire, volley, rapid fire, sharp-shooting, sniping, broadside, crossfire, salvo, cut, thrust, lunge, pass, punch, devastation, assailant, aggressor, invader.
Defence. –N. protection, guard, ward, shielding, preservation, guardianship, self-defence, self-preservation, resistance, safeguard, screen, barrage, fortification, munition,bulwark, moat, ditch, trench, dugout, gas mask, parapet, embankment, mound, bank, fence, wall, palisade, stockade, boom, portcullis, battlement, rampart, scarp, buttress, curtain, bastion, sally-port, hold, stronghold, asylum, keep, fortress, citadel, castle, fort, turret, buffer, fender, apron, mask, gauntlet, thimble, carapace, breastplate, armour, shield, hauberk, helmet, vizor, garrison, defender, protector, guardian, body guard, champion, knight-errant.
Thesaurus of Words and Phrases by Peter Mark Roget, M.D., F.R.S. Enlarged by John Lewis Roget, M.A., New Edition Revised and Enlarged by Samuel Romily Roget, M.A. Published by Grosset & Dunlap, the edition is copyright 1941, 1947.