| solid(adjective, set, strong, hard, firm) |
| solidified(adjective, set, hard, firm, solid) |
| starched(verb, adjective, hard, firm, solid) |
| starchy(adjective, hard, firm, solid, tense) |
| stark(adjective, hard, firm, solid, tense) |
| steeled(adjective, set, firm, solid, hardened) |
| steely(adjective, hard, firm, solid, tense) |
| stiff as a board(expression, adjective, idiom, firm, solid) |
| stony(adjective, hard, firm, solid, stiff) |
| stringed(verb, fastened) |
| strong(adjective, set, secure, firm, solid) |
| strung(adjective, bound) |
| stuccoed(noun, adjective) |
| tacked(verb, fastened) |
| taut(adjective, strong, hard, secure, firm) |
| tense(adjective, hard, firm, solid, stiff) |
| tethered(verb, fastened) |
| thick(adjective, hard, firm, solid, stiff) |
| thickened(adjective, hard, firm, solid, tense) |
| threaded(adjective, bound) |