acedia
apathy
boredom
brain fag
debilitation
debility
doziness
drowsiness
dullness
enervation
enfeeblement
ennui
eyestrain
faintness
fatigue
goneness
heart strain
heaviness
hebetude
hypnsesthesis
inanimation
indifference
jadedness
kef
keif
kief
lackadaisicalness
languidness
languishment
languor
languorousness
lassitude
lenitude
lentor
lethargy
lifelessness
listlessness
mental fatigue
mental strain
oscitancy
oscitation
overstrain
overtiredness
passivity
phlegm
temporary state
oscitance
dehydration
dizziness
inanition
inattention
indisposition
insomnia
irritability
malaise
repletion
sedation
slackness
sleeplessness
somnolence
soreness
tiredness