Discipliner
Full definition of discipliner
Noun
discipliner
(plural discipliners)- agent noun one who disciplines.
- 2006, Leo Zaibert, Punishment and Retribution‎, p. 33:The punisher believes that the suffering she inflicts "somehow offsets" the (perceived) wrongdoing, but even the indignant discipliner (if suffering is what the discipliner inflicts) simply in order to attain a result: in order to educate, prevent, and so on.