| flinty(adjective, strong, hard, tough, severe) |
| implacable(adjective, mean, strong, hard, tough) |
| indomitable(adjective, strong, hard, tough, determined) |
| stony(adjective, hard, solid, cold, indifferent) |
| unqualified(adjective, complete, total, solid, certain) |
| unshaken(adjective, set, clear, solid, cold) |
| anchored(adjective, calm, strong, secure, solid) |
| compressed(adjective, set, hard, solid, heavy) |
| concentrated(adjective, set, strong, hard, solid) |
| condensed(adjective, set, hard, solid, heavy) |
| fastened(adjective, strong, sound, secure, short) |
| flat(adjective, change, certain, definite, resolved) |
| hardy(noun, adjective, strong, sound, tough) |
| heavy(adjective, set, strong, hard, sound) |
| indefatigable(adjective, strong, tough, fit, solid) |
| purposeful(adjective, strong, tough, determined, serious) |
| rugged(adjective, set, strong, hard, sound) |
| specific(adjective, clear, certain, definite, sure) |
| strong-minded(adjective, certain, determined, significant, resolution) |
| unswayable(adjective, determined, resolute, rigid, obstinate) |