| stiff(adjective, hard, firm, inflexible) |
| inflexible(adjective, soft, firm, stiff, yielding) |
| rigid(adjective, soft, severe, gentle, stiff) |
| stubborn(adjective, weak, soft, firm, stiff) |
| adamant(adjective, unyielding) |
| firm(adjective, weak, obscure, uncertain, stiff) |
| obstinate(adjective, soft, firm, determined, stiff) |
| harsh(adjective, calm, soft, low) |
| brittle(adjective, firm, stiff, fragile, unbreakable) |
| stable(weak, soft, changeable) |
| unyielding(adjective, weak, firm, stiff, resolute) |
| stern(adjective, soft, gentle, firm, stiff) |
| solid(weak, loose, unstable, wobbly) |
| severe |
| unchanging |
| unpliable(adjective, firm, stiff) |
| willful(adjective, yielding, obstinate, stubborn) |
| uncompromising(adjective, stubborn) |
| hard(adjective, kind, gentle, bright) |
| fresh |