| halcyon(adjective, calm, quiet, clear, smooth) |
| placid(adjective, calm, mild, peaceful, tranquil) |
| serene(adjective, calm, mild, peaceful, tranquil) |
| at peace(expression, adjective, calm, clear, smooth) |
| calm(mild, peaceful, tranquil, easygoing, composed) |
| clear(adjective, calm, smooth, still, peaceful) |
| collected(calm, mild, peaceful, tranquil, easygoing) |
| comfortable(adjective, calm, smooth, still, peaceful) |
| composed(calm, mild, peaceful, tranquil, easygoing) |
| content(adjective, calm, clear, smooth, still) |
| cool(calm, mild, peaceful, tranquil, easygoing) |
| cool as cucumber(expression, idiom, mild) |
| deliberate(calm, composed) |
| detached(mild, easygoing, docile) |
| disimpassioned(calm, composed) |
| dispassionate(calm, peaceful, tranquil, laid-back, unflappable) |
| docile(mild, easygoing) |
| easy(adjective, calm, smooth, still, peaceful) |
| easygoing(adjective, calm, quiet, smooth, mild) |
| equable(mild, easygoing, docile) |