The Oxford Thesaurus An A-Z Dictionary of Synonyms - aggressiveadj.

1) combative, warlike, martial, belligerent, bellicose, pugnacious, quarrelsome, disputatious, litigious; hostile, unfriendly: The Germanic tribes were known to the Romans as aggressive and hardened warriors. 2) forward, assertive, forceful, bold, Colloq pushy: Dennis's aggressive nature may yet make him a good salesman.