| Answer | Crossword Clue |
|---|---|
| REM | Sleep-stage initials |
| REM | Sleep initials |
| REM | Sleep phase initials |
| REM | Sleep state initials |
| REM | Sleep stage |
| REM | Sleep study stage |
| REM | Sleep stage, initially |
| REM | Deep sleep stage |
| REM | Dreamy sleep stage |
| REM | Crucial sleep stage |
| REM | Sleep stage: Abbr. |
| REM | Sleep-stage acronym |
| REM | Sleep-stage designation |
| REM | Sleep-stage letters |
| REM | Sleep stage abbr. |
| REM | Sleep stage letters |
| REM | Sleep stage, briefly |
| REM | Sleep stage, for short |
| REM | Sleep stage for short |
| REM | Stage of sleep, for short |
