| Unworried | Quiescent | Idyllic |
| Untroubled | Pleased | Hushed |
| Unruffled | Placid | Harmonious |
| Unperturbed | Peacetime | Happy |
| Unflappable | Peace-loving | Halcyon |
| Undisturbed | Peaceable | Gratified |
| Unagitated | Pacifistic | Glad |
| Unaggressive | Pacifist | Gentle |
| Tranquil | Pacific | Genial |
| Sunny | Orderly | Friendly |
| Still | Okay | Exultant |
| Steady | Nonviolent | Even-tempered |
| Soothing | Nonchalant | Even |
| Soft | Nonbelligerent | Equable |
| Sober | Neutral | Elated |
| Smooth | Moderate | Easygoing |
| Silent | Mirthful | Easy |
| Serene | Merry | Dispassionate |
| Self-possessed | Mellow | Delighted |
| Self-controlled | Meek | Cordial |
| Sedate | Level | Cool |
| Satisfied | Lenient | Convivial |
| Restful | Laughing | Contented |
| Reposeful | Kind | Content |
| Relaxing | Jubilant | Composed |
| Relaxed | Joyous | Comfortable |
| Quieter | Joyful | Collected |
| Quieted | Jovial | Clement |
| Quiet | Irenic | Chirpy |
| At ease | Imperturbable | Carefree |
| Amicable | Impassive | Calming |
| Amiable | At peace | Calm |
| Agreeable | Blissful |
