| patterned(adjective, firm, solid, stable, fixed) |
| poised(adjective, firm, sensible, solid, steady) |
| prim |
| regular(adjective, firm, solid, stable, fixed) |
| reliable(adjective, firm, sensible, solid, steady) |
| reserved(adjective, firm, sensible, solid, steady) |
| resolute(adjective, firm, sensible, solid, steady) |
| safe(adjective, firm, solid, stable, fixed) |
| secure(adjective, firm, solid, stable, fixed) |
| self-possessed(adjective, firm, sensible, solid, steady) |
| sensible(adjective, firm, solid, steady, stable) |
| serene(adjective, firm, sensible, solid, steady) |
| set(adjective, firm, solid, stable, thoughtful) |
| set in stone(expression, adjective, idiom, firm, solid) |
| settled(adjective, firm, sensible, solid, steady) |
| single-minded(adjective, firm, sensible, solid, steady) |
| sober-sided |
| solid(adjective, firm, stable, fixed, sturdy) |
| solid as a rock(expression, adjective, idiom, firm, solid) |
| sound(adjective, firm, solid, stable, fixed) |