implacable 10 Associations

grim (similar term) inexorable (similar term) relentless (similar term) stern (similar term) unappeasable (similar term) unforgiving (similar term) unrelenting (similar term)

revengeful 10 Associations

vindictive vengeful unforgiving (similar term)

vengeful 8 Associations

revengeful vindictive unforgiving (similar term)

vindictive 10 Associations

revengeful vengeful unforgiving (similar term)