Hypersomnia vs. Hypersomnolence

Hypersomnianoun

Excessive sleepiness.

Hypersomnolencenoun

(medicine) Excessive sleepiness

Hypersomnianoun

an inability to stay awake

Hypersomnia

Hypersomnia is a neurological disorder of excessive time spent sleeping or excessive sleepiness. It can have many possible causes (such as seasonal affective disorder) and can cause distress and problems with functioning.