Synonyms for Hood (same or very similar meaning)
WordNet sense 1 (an aggressive and violent young criminal):
goon, hoodlum, punk, thug, tough, toughie, strong-armerWordNet sense 2 (metal covering leading to a vent that exhausts smoke or fumes):
exhaust hoodWordNet sense 3 (protective covering consisting of a metal part that covers the engine):
bonnet, cowl, cowlingFrom the ODE community, based on WordNetadd/edit