Synonyms to unmerciful

savage, Draconian, Goth, Gothic, Mafioso, Neanderthal, Tartarean, Young Turk, abrade, abuse, afflict, aggressive, aggrieve, agonize, animal, antagonistic, anthropophagite, anthropophagous, assault, atrocious, attack, baneful, barbarian, barbaric, barbarize, barbarous, bark, batter, battling, beast, beastly, befoul, beldam, bellicose, belligerent, berserk, berserker, bestial, bewitch, blemish, blight, bloodthirsty, bloody, bloody-minded, bomber, break, bruise, brutal, brutalize, brutalized, brute, brutish, buffet, burn, butcher, cannibal, cannibalistic, carry on, chafe, chauvinist, chauvinistic, check, chip, claw, coldhearted, combative, condemn, contentious, convulse, corrupt, crack, craze, crucify, cruel, cruel-hearted, curse, cut, damage, deadly, death-bringing, deathful, deathly, defile, demon, demoniac, demoniacal, demonic, deprave, despoil, destroy, destroyer, destructive, devil, devilish, diabolic, disadvantage, disserve, distress, do a mischief, do evil, do ill, do violence to, do wrong, do wrong by, do wrong to, doom, dragon, enemy, enraged, envenom, excruciate, fatal, fell, feral, ferine, ferocious, fiend, fiendish