Somnolence vs. Lethargy

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Difference Between Somnolence and Lethargy
Somnolencenoun
A state of drowsiness or sleepiness.
Lethargynoun
(pathology) A condition characterized by extreme fatigue or drowsiness, or prolonged sleep patterns.
Somnolencenoun
a very sleepy state;
sleepiness causes many driving accidentsLethargynoun
A state of extreme torpor or apathy, especially with lack of emotion or interest; loosely, sluggishness, laziness.
Lethargynoun
a state of comatose torpor (as found in sleeping sickness)
Lethargynoun
weakness characterized by a lack of vitality or energy
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Lethargynoun
inactivity; showing an unusual lack of energy