8 entries under sickness topic. ×

22
virus(noun, illness, bug, plague)
18
microbe(noun, illness, bug, plague)
15
germ(noun, illness, unit, bug)
13
bacillus(noun, illness, germ, bacterium)
11
bug(noun, informal, illness, plague)
4
bacterium(noun, unit, bug, plague)
2
disease(noun, illness, bug, plague)
0
infection(noun, illness, germ)
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APASmart Define. (2015). microorganism thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/microorganism/thesaurus/synonyms
ChicagoSmart Define. 2015. "microorganism thesaurus" https://smartdefine.org/microorganism/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, microorganism thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/microorganism/thesaurus/synonyms>.
MLASmart Define. "microorganism thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/microorganism/thesaurus/synonyms>