| adjective | having or showing determination and energetic pursuit of your ends “an aggressive businessman” |
| adjective | tending to spread quickly “an aggressive tumor” |
| adjective | characteristic of an enemy or one eager to fight “aggressive acts against another country” |
| aggressiveness | noun | the quality of being bold and enterprising |
| aggress | verb | take the initiative and go on the offensive |
| belligerent | noun | someone who fights (or is fighting) |
| belligerency | noun | hostile or warlike attitude or nature |
| belligerence | noun | hostile or warlike attitude or nature |