1
indisposition(noun, disorder, disease, weakness, collapse)
1
infantile paralysis
1
infectious mononucleosis
1
infirmity(noun, disorder, disease, weakness, collapse)
1
inflammation(noun, disorder, illness, defect, sickness)
1
inflammatory rheumatism
1
insubstantiality(noun, weakness, failing, infirmity, fragility)
1
jail fever
1
jungle rot
1
kala azar
1
kissing disease
1
la grippe
1
laryngitis
1
lepra
1
leprosy
1
leptospirosis
1
lipoid pneumonia
1
loa loa
1
loaiasis
1
lobar pneumonia
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>