Synonyms for Goon (same or very similar meaning)
WordNet sense 1 (an awkward stupid person):
clod, gawk, lout, lubber, lummox, lump, oaf, stumblebumWordNet sense 2 (an aggressive and violent young criminal):
hood, hoodlum, punk, thug, tough, toughie, strong-armerFrom the ODE community, based on WordNetadd/edit