courageous, plucky, fearless, valiant, valorous, intrepid, heroic, lionhearted, manful, macho,bold, daring, daredevil, adventurous, audacious, death-or-glory;
undaunted, unflinching, unshrinking, unafraid, dauntless, indomitable, doughty, mettlesome,venturesome, stout-hearted, stout, spirited, gallant, stalwart, resolute, determined
楼主我要说一下，你这问题不该问。网上都有同义词词典 (英文叫 thesaurus)，自己查一下就有了。我这上面的出处：牛津同义词词典
http://www.oxforddictionaries.com/thesaurus/