| fine-grained(adjective, hard, tough, solid, rigid) |
| close(adjective, set, hard, tough, solid) |
| firm(adjective, close, hard, solid, short) |
| compact(adjective, close, set, hard, tough) |
| compressed(adjective, set, hard, tough, firm) |
| concentrated(adjective, set, hard, tough, firm) |
| concrete(adjective, hard, tough, solid, rigid) |
| condensed(adjective, hard, tough, solid, rigid) |
| congealed(adjective, hard, tough, solid, rigid) |
| dense(adjective, set, hard, tough, firm) |
| fine |
| hardened(adjective, hard, tough, solid, rigid) |
| impenetrable(adjective, close, set, hard, tough) |
| impermeable(adjective, close, set, hard, tough) |
| impervious(adjective, hard, tough, solid, rigid) |
| incompressible(adjective, firm) |
| inelastic(adjective, hard, tough, solid, rigid) |
| jelled(adjective, hard, tough, solid, rigid) |
| narrow(adjective, close, solid, short, substantial) |
| neck and neck(adjective, close) |