| pat |
| patterned(adjective, firm, solid, substantial, stable) |
| regular(adjective, firm, solid, steady, substantial) |
| reserved(adjective, firm, solid, stable, fixed) |
| sedate(adjective, firm, solid, stable, fixed) |
| self-possessed(adjective, firm, solid, stable, fixed) |
| sensible(adjective, firm, solid, stable, fixed) |
| serene(adjective, firm, solid, stable, fixed) |
| serious-minded(adjective, firm, solid, stable, fixed) |
| settled(adjective, firm, solid, stable, fixed) |
| sober(adjective, firm, solid, stable, fixed) |
| staid(adjective, firm, solid, stable, fixed) |
| steady-going(adjective, firm, solid, substantial, stable) |
| stringent(adjective, rigid, tight) |
| tight(adjective, severe, stiff, rigid, strict) |
| uncompromising(adjective, stubborn) |
| undeviating |
| unflagging |
| unflappable |
| unqualified(adjective, firm, solid, steady, stable) |