(n.) A reformer.

Fabian adjuvant aid alterative analeptic antidote assistance balm balsam castigatory chastening chastising counteractant counteractive counteragent countermeasure counterstep curative cure disciplinary emendatory gradualistic grueling healing healing agent healing quality help iatric inflictive medicative medicinal melioristic penal penological prescription punishing punitive punitory radical receipt recipe reformational reformative reformatory reformist reformistic relief remedial remedial measure remedy restorative retributive revisional revisionist revisory revolutionary sanative sanatory sovereign remedy specific specific remedy succor therapeutic theriac utopian