1) Looking to get even 2) Revengeful 3) Seeking payback 4) Seeking to get even 5) Unforgiving 6) Vindictive 1) Revengeful 2) Unforgiving 3) Vindictive 
• (a.) Vindictive; retributive; revengeful.
Venge'ful adjective Vindictive; retributive; revengeful. ' Vengeful ire.' Milton. -- 
vengeful 1. Having or showing a strong desire for revenge. 2. Avenging; serving the purpose of revenge or resulting from someone's desire for revenge. 3. Desiring vengeance; vindictive. 4. Etymology: formed on analogy of revengeful from the obsolete verb venge; from Old French venger; from Latin vindicare, 'to demand, to lay, to claim to, to ass...