The Collaborative International Dictionary of English v.0.48:

Retributive \Re*trib"u*tive\, Retributory \Re*trib"u*to*ry\, a.
   [Cf. LL. retributorius worthy of retribution.]
   Of or pertaining to retribution; of the nature of
   retribution; involving retribution or repayment; as,
   retributive justice; retributory comforts.
   [1913 Webster]

WordNet (r) 3.0 (2006):

retributive
    adj 1: of or relating to or having the nature of retribution;
           "retributive justice demands an eye for an eye" [syn:
           retaliatory, relatiative, retributive,
           retributory, vindicatory]
    2: given or inflicted in requital according to merits or
       deserts; "retributive justice" [syn: retributive,
       retributory, vindicatory]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "retributive":
   castigatory, chastening, chastising, compensating, compensative,
   compensatory, corrective, disciplinary, grueling, indemnificatory,
   inflictive, lucrative, moneymaking, paying, penal, penological,
   profitable, punishing, punitive, punitory, reciprocal,
   recompensing, recompensive, redeeming, redemptional, redemptive,
   remunerative, reparative, repaying, restitutive, restitutory,
   restorative, retaliative, retaliatory, retributory, reversional,
   reversionary, revertible, rewardful, rewarding, satisfying