period of calm
| STILL |
| Word | Clue |
|---|---|
| AGE | era, period |
| ERA | period, epoch |
| NAP | short period of sleep |
| LULL | period of rest |
| FREEZE | period of intensely cold weather |
| SEASON | interval, period |
| INFANCY | period of childhood |
| PERMIAN | geologic period |
| CAMBRIAN | geologic period |
| DEVONIAN | geologic period |
| DOWNTIME | period when a system is unavailable |
| INTERVAL | period, pause |
| JURASSIC | geologic period |
| SILURIAN | geologic period |
| TIMESPAN | period |
| TRIASSIC | geologic period |
| PALEOGENE | geologic period |
| CRETACEOUS | geologic period |
| ORDOVICIAN | geologic period |
| CARBONIFEROUS | geologic period |
| ERA | period, epoch |
| INFANCY | period of childhood |