| existent(adjective, solid, material, real, positive) |
| harden(verb, close, set, firm, solid) |
| indurate(verb, adjective, close, set, firm) |
| mortar(noun, glue, filling, paste, plaster) |
| practical |
| stone(hardness, density, materials) |
| substantive(adjective, material, certain, substantial, real) |
| unite(verb, touch, join, stick, bring) |
| unyielding(adjective, set, hard, tough, firm) |
| accurate(adjective, close, correct, right, severe) |
| adamant(adjective, rigid, hardness) |
| block(hardness, density) |
| cobblestone(noun, verb, cover, line, way) |
| combine(verb, touch, join, stick, unite) |
| conglomerate(density, coherence) |
| curdle(noun, verb, close, set, firm) |
| detailed(adjective, close, correct, solid, exact) |
| dry(verb, close, set, firm, solid) |
| impenetrable(adjective, set, hard, tough, solid) |
| natural(adjective, material, substantial, tangible) |