| gelatinous(adjective, solid, heavy, deep) |
| gloppy(adjective, solid, heavy, deep) |
| gummous(adjective, solid, heavy, deep) |
| gunky(adjective, solid, heavy, deep) |
| impervious(adjective, hard, tough, solid) |
| indurate(adjective, strong, hard, firm) |
| jelled(adjective, hard, tough, solid) |
| jellied(adjective, solid, heavy, deep) |
| monolithic(adjective, firm, solid, hardened) |
| opaque(adjective, solid, heavy, deep) |
| ossified(adjective, solid, heavy, deep) |
| petrified(adjective, firm, solid, hardened) |
| poured(adjective, firm, solid, hardened) |
| precast(adjective, firm, solid, hardened) |
| set in stone(expression, adjective, idiom, firm) |
| steeled(adjective, firm, solid, hardened) |
| strong(adjective, close, hard, firm) |
| syrupy(adjective, solid, heavy, deep) |
| thickened(adjective, solid, heavy, deep) |
| turbid(adjective, solid, heavy, deep) |