adjective

showing a lack of fear.

a fearless crusader for animal rights

bold,brave,courageous,intrepid,valiant,valorous,gallant,plucky,lionhearted,stout-hearted,heroic,daring,dynamic,spirited,mettlesome,confident,audacious,indomitable,doughty,unafraid,undaunted,unflinching,unshrinking,unblenching,unabashed,game,gutsy,spunky,ballsy,go-ahead,have-a-go,feisty,venturous