tormentor

a person who causes repeated emotional pain, distress, or annoyance to another shocked by the news that his chief tormentor from elementary school had committed suicide at the age of 30 Synonyms baiter, harasser, heckler, mocker, needler, persecutor, quiz, quizzer, ridiculer, taunter, tease, teaser, torturer Related Words belittler, derider, detractor, giber (or jiber), insulter, jeerer, scoffer, scorner; trash-talker; smart aleck (also smart alec), smarty (or smartie), smarty-pants, wiseacre, wiseguy; kidder, lampooner, satirist; accuser, blamer, troublemaker; assailant, attacker, molester, victimizer; bother, disturber, pest Near Antonyms defender, deliverer, guard, protector, rescuer, savior (or saviour); comforter, consoler, solace, soother, succorer; bodyguard, champion