| earnest(adjective, strong, intense, passionate) |
| alert(adjective, determined, deep, fixed) |
| stiff(adjective, strong, hard, tough) |
| steady(adjective, complete, total, deep) |
| clotted(verb, adjective, solid, heavy) |
| concrete(adjective, hard, tough, solid) |
| engrossed(adjective, complete, total, determined) |
| impenetrable(adjective, hard, tough, firm) |
| impermeable(adjective, hard, tough, firm) |
| inflexible(adjective, strong, hard, tough) |
| rigid(adjective, strong, hard, complete) |
| solidified(verb, adjective, hard, tough) |
| substantial(adjective, strong, hard, tough) |
| thickened(verb, adjective, strong, solid) |
| unyielding(adjective, hard, tough, firm) |
| watchful(adjective, determined, deep, fixed) |
| absorbed(adjective, complete, total, intense) |
| caked(adjective, solid, heavy, deep) |
| clabbered(adjective, solid, heavy, deep) |
| close-grained(adjective, hard, tough, firm) |