| compacted(adjective, strong, hard, firm) |
| consolidated(adjective, strong, hard, firm) |
| rugged(adjective, strong, hard, tough) |
| stony(adjective, strong, hard, firm) |
| clotted(adjective, solid, heavy, deep) |
| inflexible(adjective, close, strong, hard) |
| solidified(adjective, hard, tough, solid) |
| sturdy(adjective, person, close, body) |
| adamantine(adjective, strong, hard, tough) |
| coagulated(adjective, solid, heavy, deep) |
| congealed(adjective, hard, tough, solid) |
| gelatinous(adjective, solid, heavy, deep) |
| hard as nails(expression, adjective, idiom, strong) |
| impervious(adjective, hard, tough, solid) |
| iron(adjective, strong, hard, tough) |
| jelled(adjective, hard, tough, solid) |
| jellied(adjective, solid, heavy, deep) |
| rocky(adjective, strong, hard, firm) |
| syrupy(adjective, solid, heavy, deep) |
| turbid(adjective, dull, solid, heavy) |