Word Study
remorseless
CIDE DICTIONARY
remorseless, a.
Being without remorse; having no pity; hence, destitute of sensibility; cruel; insensible to distress; merciless. [1913 Webster]
Syn. -- Unpitying; pitiless; relentless; unrelenting; implacable; merciless; unmerciful; savage; cruel.
OXFORD DICTIONARY
remorseless, adj. without compassion or compunction.
Derivative
remorselessly adv. remorselessness n.
THESAURUS
remorseless
bowelless, callous, cruel, dog-eat-dog, flinty, griefless, hard, harsh, heartless, impenitent, implacable, inclement, inexorable, merciless, pitiless, regretless, relentless, ruthless, savage, shameless, sorrowless, unashamed, uncompassionate, uncompassioned, uncontrite, unfeeling, unforgiving, ungrieving, unmerciful, unpitiful, unpitying, unregretful, unregretting, unrelenting, unremitting, unremorseful, unrepentant, unrepining, unrueful, unsorrowful, unsorrowing, unsorry, unstoppable, unsympathetic, unsympathizing, unyielding, without mercyROGET THESAURUS
remorseless
Revenge
N revenge, revengement, vengeance, avengement, avengeance, sweet revenge, vendetta, death feud, blood for blood retaliation, day of reckoning, rancor, vindictiveness, implacability, malevolence, ruthlessness, avenger, vindicator, Nemesis, Eumenides, revengeful, vengeful, vindictive, rancorous, pitiless, ruthless, rigorous, avenging, unforgiving, unrelenting, inexorable, stony-hearted, implacable, relentless, remorseless, aeternum servans sub pectore vulnus, rankling, immitigable, manet ciratrix, manet alid mente repostum, dies irae dies illa, in high vengeance there is noble scorn, inhumanum verbum est ultio, malevolus animus abditos dentes habet, now infidel I have thee on the hip.Impenitence
N impenitence, irrepentance, recusance, lack of contrition, hardness of heart, seared conscience, induration, obduracy, impenitent, uncontrite, obdurate, hard, hardened, seared, recusant, unrepentant, relentless, remorseless, graceless, shriftless, lost, incorrigible, irreclaimable, unreconstructed, unregenerate, unreformed, unrepented, unreclaimed, unatoned.For further exploring for "remorseless" in Webster Dictionary Online