| intruder(noun, attacker, settler, foreigner, stranger) |
| aggressor(noun, attack, attacker, goon, mugger) |
| assailant(noun, attack, opposition, agent, villain) |
| attacker(noun, opposition, agent, villain, rebel) |
| encroacher(noun, offender, intruder) |
| antagonist(noun, opposition, agent, rebel, criminal) |
| enemy(noun, someone, rival, opponent, enemy) |
| raider(noun, attacker, assailant) |
| interloper(noun, attacker, settler, foreigner, stranger) |
| trespasser(noun, criminal, thief, attacker, offender) |
| foe(noun, opposition, agent, villain, rebel) |
| alien(noun, being, attacker, foreigner, stranger) |
| criminal(noun, opposition, agent, villain, rebel) |
| assaulter(noun, attacker, goon, mugger, assailant) |
| infringer(noun, offender, intruder) |
| mugger(noun, attacker, goon, assailant) |
| opposition(noun, agent, rebel, criminal, rival) |
| adversary(noun, opposition, agent, rebel, criminal) |
| archenemy(noun, opposition, agent, villain, rebel) |
| assailer |