| reckless(adjective, mad, bold, naughty, impudent) |
| self-confident(certain, sure, guaranteed) |
| staunch(adjective, determined, bold, resolute, brave) |
| tenacious(adjective, strong, tough, determined, vigorous) |
| adventuresome(adjective, mad, bold, naughty, impudent) |
| brash(adjective, smart, mad, bold, confident) |
| brazen(adjective, smart, solid, certain, bold) |
| determined(adjective, clear, tough, severe, energetic) |
| feisty(adjective, tough, energetic, determined, mad) |
| firm(adjective, strong, determined, bold, resolute) |
| free-swinging(adjective, mad, bold, naughty, impudent) |
| indomitable(adjective, strong, tough, bold, spirited) |
| manful |
| potent(adjective, clear, strong, tough, severe) |
| sturdy |
| tough(adjective, clear, strong, severe, lively) |
| unfearful(adjective, strong, bold, resolute, spirited) |
| unfearing(adjective, bold, confident, fearless) |
| venturous(adjective, mad, bold, naughty, impudent) |
| vigorous(adjective, strong, energetic, powerful, determined) |