| quieted(adjective, calm, relaxed, tranquil, easygoing) |
| ratiocinative(adjective, clear, sound, sensible, fair) |
| reasoning(adjective, sound, sensible, rational, intelligent) |
| reflective(adjective, sound, sensible, rational, intelligent) |
| relaxed(adjective, calm, tranquil, easygoing, serene) |
| relevant(clear, sound, reasonable, sensible, rational) |
| reliable |
| repressed(adjective, calm, relaxed, tranquil, easygoing) |
| right(sensible, rational, healthy, stable, sober) |
| right-minded(sensible, rational, healthy, stable, sober) |
| sedate(adjective, calm, relaxed, tranquil, easygoing) |
| self-assured(adjective, calm, relaxed, tranquil, easygoing) |
| self-possessed(adjective, calm, sound, reasonable, sensible) |
| serene(adjective, calm, relaxed, restrained, tranquil) |
| serious(adjective, calm, relaxed, tranquil, easygoing) |
| serviceable(adjective, reasonable, sensible, useful, sober) |
| shrewd(adjective, sound, reasonable, rational, sober) |
| soothed(adjective, calm, relaxed, tranquil, easygoing) |
| staid(adjective, calm, relaxed, tranquil, easygoing) |
| subtle(clear, sound, reasonable, sensible, rational) |