| lung cancer | |
| lung fever | |
| madness | |
| malaise(noun, disorder, disease, weakness, collapse) | |
| malaria | |
| marsh fever | |
| meningitis | |
| milzbrand | |
| misery(noun, disorder, illness, defect, sickness) | |
| ornithosis | |
| osteomyelitis | |
| paratyphoid fever | |
| parotitis | |
| parrot fever | |
| pathosis(noun, disorder, growth, defect, sickness) | |
| pharyngitis | |
| pinkeye | |
| plague(noun, disorder, growth, defect, sickness) | |
| pleurisy | |
| pleuritis |
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| APA | Smart Define. (2015). flu thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/flu/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "flu thesaurus" https://smartdefine.org/flu/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, flu thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/flu/thesaurus/synonyms>. |
| MLA | Smart Define. "flu thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/flu/thesaurus/synonyms> |