The Collaborative International Dictionary of English v.0.48:
Vengeful \Venge"ful\, a. Vindictive; retributive; revengeful. "Vengeful ire." --Milton. -- Venge"ful*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
vengeful adj 1: disposed to seek revenge or intended for revenge; "more vindictive than jealous love"- Shakespeare; "punishments...essentially vindictive in their nature"- M.R.Cohen [syn: revengeful, vindictive, vengeful]