| respectable(modest, polite, prim) |
| rife(usual, main, universal, general, principal) |
| routine(usual, normal, accepted, traditional, habitual) |
| rule(noun, style, practice, system, arrangement) |
| ruling(usual, main, universal, general, principal) |
| sedulous |
| seemly(correct, modest, polite, stiff, affected) |
| set(severe, usual, strict, stern, general) |
| set up(expression, exact, neat, organized) |
| solid(modest, polite, square, prim) |
| sop(usual, normal, accepted, traditional, habitual) |
| standard operating procedure(expression, usual, normal, accepted, traditional) |
| steady(usual, main, universal, general, principal) |
| stickler |
| stipulated(usual, normal, accepted, traditional, habitual) |
| stone(solid, modest, polite, square, prim) |
| strait-laced(solid, modest, polite, square, prim) |
| strenuous |
| strict(adjective, severe, harsh, stiff, rigid) |
| stringent(adjective, rigid, tight) |