aggress

To commit the first act of hostility or offense; to begin a quarrel or controversy; to make an attack; -- with on. Aggression. [Obs.] Their military aggresses on others. Sir M. Hale. To set upon; to attack. [R.]

Source: Webster's Revised Unabridged Dictionary (1913), United States public domain. See methodology for full licensing detail. Word validity for game play may differ from any official game dictionary.