| courageous(adjective, strong, determined, vigorous, noble) |
| invincible(adjective, strong, strength, do, win) |
| unconquerable(adjective, strong, secure, strength, do) |
| determined(adjective, strong, hard, tough, firm) |
| brave(adjective, strong, tough, determined, vigorous) |
| resolute(adjective, strong, tough, firm, determined) |
| dogged(adjective, strong, firm, determined, steady) |
| unyielding(adjective, set, strong, hard, tough) |
| dauntless(adjective, strong, tough, determined, vigorous) |
| fearless(adjective, strong, tough, determined, vigorous) |
| stubborn(adjective, strong, hard, tough, difficult) |
| firm(noun, adjective, strong, hard, tough) |
| staunch(adjective, strong, firm, determined, steady) |
| obstinate(adjective, violent, determined, resolution, resolute) |
| steadfast(adjective, strong, determined, vigorous, noble) |
| impregnable(adjective, strength, do, win, steadfast) |
| strong(adjective, hard, great, tough, firm) |
| tenacious(adjective, strong, tough, firm, difficult) |
| resolved(adjective, determined, resolution, courage, resolute) |
| unflinching(adjective, strong, firm, determined, steady) |