THESAURUS
callous, hard, hardened, impenitent, insolent, obdurate, recidivist, recidivistic, recidivous, regretless, remorseless, unabject, unashamed, uncontrite, unembarrassed, unmelted, unregenerate, unregretful, unremorseful, unrepenting, unsoftened, unsorry, untouched
ROGET THESAURUS
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.