5 entries under micro-organism topic. ×

11
germ(noun, illness, unit, bug, egg)
11
microbe(noun, illness, sickness, bug, plague)
11
virus(noun, animal, creature, disease, bug)
9
bacillus(noun, illness, sickness, germ, microorganism)
3
pathogen
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APASmart Define. (2015). bacterium thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/bacterium/thesaurus/synonyms
ChicagoSmart Define. 2015. "bacterium thesaurus" https://smartdefine.org/bacterium/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, bacterium thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/bacterium/thesaurus/synonyms>.
MLASmart Define. "bacterium thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/bacterium/thesaurus/synonyms>