As nouns the difference between sleeplessness and agrypnia
is that sleeplessness is the property of being sleepless while agrypnia is (medicine) persistent loss of sleep; insomnia; sleeplessness.
sleeplessness
English
Noun
(sleeplessnesses)
The property of being sleepless.
See also
* insomnia
agrypnia
English
Noun
(-)
(medicine) Persistent loss of sleep; insomnia; sleeplessness.