From Longman Dictionary of Contemporary Englishchild molesterˈchild moˌlester noun [countable] someone who harms children by touching them in a sexual way, or trying to have sex with them —child molesting noun [uncountable]
Examples from the Corpus
child molester• Brian Brown, 57, claims he had to share a room with a murderer, a rapist and a child molester.• They maintain their father threatened to kill his sons to stop them from exposing him as a child molester.• Probably a child molester, probably couldn't get it up for anything normal.• More recently, Lychner began a campaign to pay for the voluntary castration of paroled child molester Larry Don McQuay. 