| impermeable(adjective, hard, tough, firm) |
| caked(adjective, solid, heavy, deep) |
| clabbered(adjective, solid, heavy, deep) |
| congealed(noun, verb, adjective, hard) |
| fixed(adjective, strong, solid, heavy) |
| 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) |
| jelled(verb, adjective, hard, tough) |
| jellied(verb, adjective, solid, heavy) |
| opaque(adjective, solid, heavy, deep) |
| ossified(adjective, solid, heavy, deep) |
| syrupy(adjective, solid, heavy, deep) |
| turbid(adjective, solid, heavy, deep) |
| vitrified(adjective, solid, heavy, deep) |