| poured(adjective, set, firm, solid, hardened) |
| prearranged(adjective, firm, determined, usual, regular) |
| precast(adjective, set, firm, solid, stiff) |
| predetermined(adjective, firm, determined, usual, regular) |
| prescribed(adjective, firm, determined, usual, regular) |
| regular(adjective, complete, firm, solid, determined) |
| reliable(adjective, calm, strong, secure, firm) |
| reserved(adjective, tough, firm, solid, stable) |
| resolved(adjective, firm, determined, usual, regular) |
| rooted(adjective, secure, firm, determined, usual) |
| safe(adjective, calm, strong, secure, firm) |
| scheduled(adjective, firm, determined, usual, regular) |
| secure(adjective, calm, strong, firm, solid) |
| set in concrete(expression, adjective, fixed, impassive, stubborn) |
| settled(adjective, firm, solid, determined, usual) |
| solid as a rock(expression, adjective, idiom, calm, strong) |
| solidified(adjective, set, firm, solid, hardened) |
| sound(adjective, calm, strong, secure, firm) |
| specified(adjective, firm, determined, usual, regular) |
| stabile(adjective, calm, strong, secure, firm) |