| bent(adjective, set, strong, flat, firm) |
| dedicated(adjective, set, clear, strong, tough) |
| fearless(adjective, strong, tough, firm, energetic) |
| immutable(adjective, calm, strong, hard, determined) |
| masculine(adjective, vigorous, noble, courageous, manlike) |
| stable(adjective, strong, secure, easy, flat) |
| stony(adjective, cold, indifferent, unyielding, tenacious) |
| unshaken(adjective, strong, flat, firm, solid) |
| contrary(adjective, difficult, determined, obstinate, stubborn) |
| daring(adjective, strong, vigorous, noble, bold) |
| diligent(adjective, tenacious) |
| game(adjective, strong, tough, energetic, passionate) |
| gritty(adjective, strong, tough, energetic, passionate) |
| hard(adjective, tough, sharp, firm, intense) |
| hardheaded(adjective, determined, obstinate, uncompromising, unshakeable) |
| headstrong(adjective, hard, tough, sharp, firm) |
| inelastic(adjective, tough, firm, determined, distant) |
| pat(adjective, firm, solid, determined, awkward) |
| settled(adjective, set, strong, easy, flat) |
| spirited(adjective, strong, keen, energetic, passionate) |