WordNet records no synonym and no antonym for aversion therapy. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
any technique of behavior modification that uses unpleasant stimuli in a controlled fashion to alter behavior in a therapeutic way; primarily used for alcoholism or drug abuse (but with little success)
Synonyms, antonyms and the broader and narrower relations for aversion therapy come from Princeton University’s WordNet. Full sources and licences.