| venturesome(adjective, strong, bold, spirited, brave) |
| ardent(adjective, close, correct, keen, firm) |
| audacious(adjective, strong, tough, energetic, passionate) |
| bull-headed(adjective, determined, obstinate, stubborn, uncompromising) |
| deliberate(adjective, severe, firm, intense, determined) |
| energetic(adjective, keen, intense, lively, determined) |
| enterprising(adjective, activity, bold, brave, daring) |
| fast(adjective, calm, close, strong, secure) |
| fervent(adjective, clear, tough, severe, keen) |
| grim(adjective, appearance, determined, manner, hopeless) |
| gutsy(adjective, clear, strong, tough, severe) |
| hardy(strong, vigorous, noble, bold, spirited) |
| hearty(adjective, tenacious) |
| hidebound(adjective, determined, obstinate, stubborn, uncompromising) |
| manful(adjective, vigorous, noble, courage, courageous) |
| resistant(adjective, firm, determined, true, obstinate) |
| solid(adjective, calm, strong, secure, tough) |
| unalterable(adjective, calm, strong, hard, definite) |
| assiduous |
| bigoted(adjective, determined, obstinate, uncompromising, unshakeable) |