1
dry pleurisy
1
dumdum fever
1
dysentery
1
dyspepsia
1
elephantiasis
1
emphysema
1
empyema
1
encephalitis lethargica
1
endemic(noun, disorder, illness, defect, sickness)
1
enteric fever
1
epidemic(noun, disorder, defect, taint, affliction)
1
epidemic pleurodynia
1
exanthema
1
failing(noun, disorder, weakness, fault, illness)
1
failing health(noun, expression, disorder, collapse, disturbance)
1
famine fever
1
fault(noun, disorder, weakness, illness, failing)
1
feebleness(noun, disorder, weakness, fault, illness)
1
fibrinous pneumonia
1
fit(noun, disorder, collapse, disturbance, defect)
11 years ago|3.9k views|share |citing 
APASmart Define. (2015). flu thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/flu/thesaurus/synonyms
ChicagoSmart Define. 2015. "flu thesaurus" https://smartdefine.org/flu/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, flu thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/flu/thesaurus/synonyms>.
MLASmart Define. "flu thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/flu/thesaurus/synonyms>