period of rest
| LULL |
| Word | Clue |
|---|---|
| AGE | era, period |
| ERA | period, epoch |
| NAP | short period of sleep |
| MASS | critical or rest |
| STILL | period of calm |
| ENERGY | mental or rest |
| 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 |
| REMAINDER | residue, rest |
| CRETACEOUS | geologic period |
| ORDOVICIAN | geologic period |
| CARBONIFEROUS | geologic period |
| VIGIL | Period of intentional sleeplessness |
| INTERVAL | period, pause |