Nouns

(n)lethargy, lassitude, sluggishnessa state of comatose torpor (as found in sleeping sickness)
(n)sluggishnessthe pace of things that move relatively slowly“the sluggishness of the economy”, “the sluggishness of the compass in the Arctic cold”
(n)languor, lethargy, sluggishness, phlegm, flatnessinactivity; showing an unusual lack of energy“the general appearance of sluggishness alarmed his friends”