| perpetrator |
| interloper(noun, attacker, intruder, encroacher) |
| intruder(noun, attacker, invader, encroacher) |
| invader(noun, attacker, intruder, encroacher) |
| transgressor(noun, person, disturbance, criminal, crook) |
| offender(noun, person, disturbance, criminal, crook) |
| sinner(noun, criminal, crook, convict, fugitive) |
| attacker(noun, person, disturbance, violation) |
| felon(noun, person, disturbance, criminal, crook) |
| hoodlum(noun, person, disturbance, crook, convict) |
| hooligan(noun, person, disturbance, crook, convict) |
| malefactor(noun, person, disturbance, criminal, crook) |
| violator(noun, person, disturbance, violation, attacker) |
| aggressor(noun, attacker, intruder, invader) |
| wrongdoer(noun, criminal, crook, convict, thug) |
| assailant(noun, person, disturbance, violation, attacker) |
| criminal(noun, person, crook, convict, offender) |
| abductor(noun, person, disturbance, violation, attacker) |
| abuser(noun, person, disturbance, violation, attacker) |
| assaulter(noun, person, disturbance, violation, attacker) |