| black lung | |
| blackwater fever | |
| brash | |
| breakdown(noun, disorder, collapse, disturbance, defect) | |
| bronchial pneumonia | |
| bronchiectasis | |
| bronchiolitis | |
| bronchitis | |
| bronchopneumonia | |
| brucellosis | |
| cachectic fever | |
| canker(noun, disorder, growth, defect, sickness) | |
| catarrh | |
| cerebral rheumatism | |
| chalicosis | |
| chicken pox | |
| chorea | |
| chronic bronchitis | |
| collapse(noun, disorder, disease, disturbance, defect) | |
| collapsed lung |
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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> |