| embodied(adjective, physical, material, manifest, actual) |
| evidential(adjective, manifest) |
| exact(adjective, correct, solid, proper, true) |
| explicit(adjective, clear, correct, solid, exact) |
| ferroconcrete |
| flag |
| flagging(noun, throughway, flagstone, putty, sealant) |
| flagstone(noun, verb, cover, pitch, surface) |
| flint |
| flinty |
| gel(verb, set, dry, jellied, calcify) |
| gelatinate(verb, set, jellied, calcify, thicken) |
| grout(noun, glue, filling, paste, plaster) |
| hard as nails(expression, idiom) |
| heart of oak(expression, idiom, hardness) |
| heavy(adjective, set, hard, tough, solid) |
| honest(adjective, physical, material, real, actual) |
| incompressible(adjective, firm, density) |
| inflexible(adjective, hard, tough, solid, rigid) |
| inspissate(set, dry, thicken, coagulate, clot) |