| virus(noun, disease, bug, toxin, venom) | |
| germ(noun, bug, toxin, venom, microorganism) | |
| bacterium(noun, disease, bug, mold, leaven) | |
| bug(noun, germ) | |
| microbe(noun, littleness, microorganism) | |
| bacillus(noun, germ, microorganism) | |
| germs(noun, microorganisms) | |
| microbes(noun, microorganisms) | |
| microorganism(noun, microorganism) | |
| animalcule(noun, littleness, microorganism) | |
| bacilli(noun, microorganisms) | |
| microorganisms(noun, microorganisms) | |
| protozoa(noun, microorganism, microorganisms) | |
| amoeba(noun, microorganism) | |
| disease germ | |
| dyad(noun, microorganism) | |
| microspore(noun, microorganism) | |
| paramecium(noun, microorganism) | |
| zoospore(noun, microorganism) | |
| listeria |
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| APA | Smart Define. (2016). bacteria thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/bacteria/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "bacteria thesaurus" https://smartdefine.org/bacteria/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, bacteria thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/bacteria/thesaurus/synonyms>. |
| MLA | Smart Define. "bacteria thesaurus" 8 March 2016. Web. 20 September 2026. <https://smartdefine.org/bacteria/thesaurus/synonyms> |