| having nerves of steel(expression, idiom, bold, confident, fearless) |
| hazardable(noun, adjective) |
| heroical |
| herolike(strong, bold, spirited, courageous, fearless) |
| hot(adjective, bright, energetic, passionate, determined) |
| hot shot(expression, adjective, smart, bold, brave) |
| hyper(adjective, bright, energetic, passionate, determined) |
| impavid(strong, tough, bold, spirited, brave) |
| implacable(adjective, resolute) |
| imprudent(strong, bold, spirited, courageous, fearless) |
| impudent(adjective, smart, bold, brave, impulsive) |
| impulsive(adjective, smart, bold, brave, reckless) |
| inexorable(adjective, resolute) |
| iron-willed(adjective, resolute) |
| jumping(adjective, bright, energetic, passionate, determined) |
| keen(adjective, clear, tough, severe, smart) |
| macho |
| martial(strong, tough, bold, spirited, brave) |
| militant(strong, determined, bold, spirited) |
| obdurate(adjective, tenacious) |