| inflexible(adjective, hard, firm, solid, stiff) |
| stiff(adjective, hard, firm, dead, rigid) |
| unyielding(adjective, hard, firm, solid, resolute) |
| firm(adjective, hard, solid, stiff, rigid) |
| hard(adjective, firm, solid, stiff, rigid) |
| immalleable(adjective, hard, firm, solid, stiff) |
| inelastic(adjective, hard, firm, solid, stiff) |
| rigid(adjective, hard, firm, solid, stiff) |
| steely(adjective, hard, firm, solid, stiff) |
| unbending(adjective, hard, firm, solid, stiff) |
| adamant |
| annealed(adjective, hard, firm, solid, stiff) |
| arthritic(adjective, hard, firm, solid, stiff) |
| benumbed(adjective, hard, firm, solid, stiff) |
| brittle(adjective, hard, firm, solid, stiff) |
| buckram(adjective, hard, firm, solid, stiff) |
| cemented(adjective, hard, firm, solid, stiff) |
| chilled(adjective, hard, firm, solid, stiff) |
| congealed(adjective, hard, firm, solid, stiff) |
| contracted(adjective, hard, firm, solid, stiff) |