Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
ROGET THESAURUS

WORDNET DICTIONARY

Noun aggressor has 2 senses

• aggressor(n = noun.person) assailant, assaulter, attacker - someone who attacks; Array
is a kind of offender, wrongdoer
has particulars: ambusher, avenger, retaliator, beast, brute, savage, wildcat, wolf, bludgeoner, bully, hooligan, roughneck, rowdy, ruffian, tough, yob, yobbo, yobo, harasser, harrier, iconoclast, marauder, piranha, predator, vulture, night rider, nightrider, raper, rapist, shedder, spiller, slasher, stabber, lapidator, stoner
Derived form verb aggress₁

• aggressor(n = noun.person) Array - a confident assertive person who acts as instigator; Array
is a kind of initiator, instigator

CIDE DICTIONARY

OXFORD DICTIONARY

ROGET THESAURUS

aggressor

Attack

N attack, assault, assault and battery, onset, onslaught, charge, aggression, offense, incursion, inroad, invasion, irruption, outbreak, estrapade, ruade, coupe de main, sally, sortie, camisade, raid, foray, run at, run against, dead set at, storm, storming, boarding, escalade, siege, investment, obsession, bombardment, cannonade, fire, volley, platoon fire, file fire, fusillade, sharpshooting, broadside, raking fire, cross fire, volley of grapeshot, whiff of the grape, feu d'enfer, cut, thrust, lunge, pass, passado, carte and tierce, home thrust, coupe de bec, kick, punch, battue, razzia, Jacquerie, dragonnade, devastation, eboulement, assailant, aggressor, invader, base of operations, point of attack, echelon, attacking, aggressive, offensive, obsidional, up in arms, on the offensive, Int, up and at them!, the din of arms, the yell of savage rage, the shriek of agony, the groan of death, their fatal hands no second stroke intend, thirst for glory quells the love of life.

For further exploring for "aggressor" in Webster Dictionary Online