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Belonging to the Losing My Religion group, 4 letters
Certain sleep stages, in brief, 4 letters
Deep sleep indicators, 4 letters
Dream accompani- ments, 4 letters
Dream indicators briefly, 4 letters
Dreamer's eyeball movements, 4 letters
Dreamer's phenomena, 4 letters
Dreamer's reactions, 4 letters
Phenomena after retiring, 4 letters
Radiation meas. units, 4 letters
Signs of dreaming for short, 4 letters
Sleep cycle occurrences, 4 letters
Sleep cycle phenomena, 4 letters
Sleep phases, briefly, 4 letters
Sleep states, briefly, 4 letters
Units of concern to nuclear scientists, 4 letters
Saccharin discoverer Ira, 6 letters
A catnap may not provide it, 8 letters
Cause of a nightmare?, 8 letters