fire–breather

an aggressive and fiercely determined person the only hope for turning around that failing company would be a CEO who's a real fire-breather Synonyms barracuda, fire-breather, fire-eater, tigerRelated Words attack dog, hatchet man; aggressor, bully, shark; go-getter, hustler, live wire, self-starter; battler, fighter, scrapper; diehard, militantNear Antonyms pushover, pussycat, reed, softy (or softie), weakling, wimpAntonyms milquetoast