| undiscouraged(adjective, bold, unconcerned, brave, steadfast) |
| undaunted(adjective, bold, brave) |
| firm(adjective, strong, determined, steady, constant) |
| indefatigable(adjective, strong, firm, determined, steady) |
| resolute(adjective, strong, firm, determined, steady) |
| bold |
| constant(adjective, strong, firm, determined, steady) |
| dauntless(adjective, bold, unconcerned, brave, steadfast) |
| dedicated(adjective, strong, firm, determined, steady) |
| devoted(adjective, strong, firm, determined, steady) |
| dogged(adjective, strong, firm, determined, steady) |
| eager beaver(expression, adjective, strong, firm, determined) |
| fearless(adjective, bold, unconcerned, brave, steadfast) |
| fire-eating(adjective, bold, unconcerned, brave, steadfast) |
| fireball(adjective, strong, firm, determined, steady) |
| gallant(adjective, bold, unconcerned, brave, steadfast) |
| go-go(adjective, strong, firm, determined, steady) |
| grind(adjective, strong, firm, determined, steady) |
| icy(adjective, bold, unconcerned, brave, steadfast) |
| incessant(adjective, strong, firm, determined, steady) |