aggressor
1. [ noun ] someone who attacks
Synonyms: attacker assaulter assailant
Related terms: wrongdoer mugger beast raper bully marauder avenger ambusher harasser stabber slasher shedder bludgeoner lapidator night_rider attack attack attack assail attack attack
2. [ noun ] a confident assertive person who acts as instigator
Related terms: instigator
Similar spelling:   aggress
  aggressive
  aggression
  aggregator
  Agrostis
  aggressively
  aggregate
  Agresta