aggressor[noun]Synonyms: attacker, assailant, assaulter, invader
[TahlilGaran] English Synonym Dictionary ▲
ag‧gres‧sor /əˈɡresə $ -ər/
noun [countable] a person or country that begins a fight or war with another person or country:
measures taken to deter potential aggressors [TahlilGaran] Dictionary of Contemporary English ▲