pervert has 19 distinct synonyms spread across 4 of its 4 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
corrupt morally or by intemperance or sensuality
“debauch the young people with wine and women”
practice sophistry; change the meaning of or be vague about in order to mislead or deceive
“Don't twist my words”
change the inherent purpose or function of something
“Don't abuse the system”
a person whose behavior deviates from what is acceptable especially in sexual behavior
Synonyms, antonyms and the broader and narrower relations for pervert come from Princeton University’s WordNet. Full sources and licences.