ruthless
I
adjective
atrocious, barbarous, bloodthirsty, brutal, brutish, callous, cold, cold-blooded, cold-hearted, cruel, deadly, demoniac, devilish, diabolical, dispiteous, fell, feral, ferine, ferocious, fiendish, grim, hard, hardhearted, harsh, heartless, immisericors, implacable, inclement, inexorabilis, inexorable, inflexible, inhuman, inhumane, inhumanus, insensitive, lethal, maleficent, malevolent, malign, malignant, marble-hearted, merciless, murderous, obdurate, pitiless, poisonous, rancorous, relentless, remorseless, retaliative, revengeful, sadistic, sanguinary, savage, stony-hearted, treacherous, truculent, uncompassionate, unfeeling, unforgiving, unkind, unmerciful, unpitying, unrelenting, unsparing, unsympathetic, vengeful, venomous, vicious, vindictive, virulent, without pity
II
index
brutal, cold-blooded, cruel, diabolic, draconian, harsh, malevolent, malicious, malignant, relentless, remorseless, severe, uncompromising, unrelenting, unscrupulous
Burton's Legal Thesaurus.
William C. Burton.
2006