Synonyms|19Antonyms|1|Broader|0Narrower|0Related|0
2
debility(noun, weakness, lethargy, weariness, tiredness)
2
lassitude(noun, weakness, lethargy, weariness, tiredness)
2
weariness(noun, weakness, lethargy, tiredness, exhaustion)
1
eyestrain
1
languor
1
sleepiness
1
strain
1
weakness
0
burnout(noun, weakness, lethargy, weariness, tiredness)
0
dullness(noun, weakness, lethargy, weariness, tiredness)
0
ennui(noun, weakness, lethargy, weariness, tiredness)
0
faintness(noun, weakness, lethargy, weariness, tiredness)
0
fatigation(noun, weakness, lethargy, weariness, tiredness)
0
fatigue(noun, tiredness)
0
heaviness(noun, weakness, lethargy, weariness, tiredness)
0
lethargy(noun, weakness, weariness, tiredness, exhaustion)
0
listlessness(noun, weakness, lethargy, weariness, tiredness)
0
overtiredness(noun, weakness, lethargy, weariness, tiredness)
0
tiredness(noun, weakness, lethargy, weariness, exhaustion)
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ChicagoSmart Define. 2015. "brain fag thesaurus" https://smartdefine.org/brain_fag/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, brain fag thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/brain_fag/thesaurus/synonyms>.
MLASmart Define. "brain fag thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/brain_fag/thesaurus/synonyms>