valiant

Synonyms: adventurous assertive audacious bold chivalrous courageous dauntless fearless fire-eating gallant game grand great gritty gutsy gutty heroic high-spirited indomitable intrepid lion-hearted magnanimous nervy noble plucky powerful puissant redoubtable self-reliant spunky stalwart steadfast stout stouthearted strong-willed unafraid undaunted undismayed valorous venturesome venturous vigorous worthy

Antonyms: afraid cowardly