malicious
unforgiving
bitter
grudgeful
mean
nasty
punitive
retaliative
revengeful
spiteful
vengeful
vindicate
vindication
vindicator
bloodthirsty
cruel
envious
ferocious
greedy
hateful
implacable
inhuman
jealous
malignant
resentful
ruthless
tyrannical
addictive
predictive
restrictive