intimidator

a person who teases, threatens, or hurts smaller or weaker persons the loan shark hired an intimidator to make sure that he got all that was owed him Synonyms bullyboy, hector, bullyRelated Words antagonist, enemy; abuser, baiter, giber (or jiber), harasser, harrier, heckler, mocker, needler, oppressor, persecutor, ridiculer, taunter, tease, teaser, torturer; goon, hood, hoodlum, hooligan, mug, punk, rough, roughneck, rowdy, ruffian, thug, tough, toughie (also toughy); cutthroat, felon, gangster, gunman, mobster, racketeer