| plucky(adjective, resolute) |
| reliable(adjective, resolute, persistent, dedicated, unwavering) |
| set(adjective, strong, flat, firm, certain) |
| stable(adjective, strong, flat, determined, definite) |
| stalwart |
| tireless(adjective, set, strong, firm, energetic) |
| valiant(adjective, firm, ready, determined, bold) |
| daring(adjective, courage) |
| decided(adjective, firm, certain, resolution, limited) |
| faithful(adjective, strong, firm, determined, bold) |
| heroic |
| invincible(adjective, persistent, obstinate, insistent, dogged) |
| single-minded(adjective, harsh, cruel, determined, fierce) |
| sure(adjective, strong, flat, certain, determined) |
| true(adjective, strong, flat, firm, certain) |
| uncompromising(adjective, firm, harsh, cruel, determined) |
| unconquerable(adjective, persistent, obstinate, insistent, dogged) |
| undeviating(adjective, strong, flat, harsh, certain) |
| undismayed(adjective, bold, courage, unconcerned, brave) |
| unrelenting(adjective, mean, severe, harsh, cruel) |