Open English Wordnet
Adjectives
(s)gory, sanguinary, sanguineous, slaughterous, butcherlyaccompanied by bloodshed“this bitter and sanguinary war”
(s)bloodthirsty, bloody-minded, sanguinarymarked by eagerness to resort to violence and bloodshed“bloody-minded tyrants”, “bloodthirsty yells”, “went after the collaborators with a sanguinary fury that drenched the land with blood” (.W.Johnson)