| hardened(noun, verb, adjective, strong) |
| indurated(verb, adjective, hard, unfeeling) |
| toughened(noun, verb, adjective, hard) |
| calcified(adjective, firm, solid, hardened) |
| indurate(adjective, firm, solid, hardened) |
| petrified(verb, adjective, firm, solid) |
| solidified(verb, adjective, firm, solid) |
| caked(adjective, firm, solid, hardened) |
| cemented(adjective, firm, solid, hardened) |
| compact(adjective, firm, solid, hardened) |
| compressed(adjective, firm, solid, hardened) |
| concrete(adjective, firm, hardened, unsubmissive) |
| congealed(verb, adjective, firm, solid) |
| conglomerated(adjective, firm, solid, hardened) |
| consolidated(adjective, firm, solid, hardened) |
| dried(verb, adjective, firm, solid) |
| firm(adjective, strong, hard, solid) |
| monolithic(adjective, firm, solid, hardened) |
| poured(adjective, firm, solid, hardened) |
| precast(adjective, firm, solid, hardened) |