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)
9
bacteria(noun, disease, bug, mold, leaven)
5
bug(noun, illness, sickness, plague, germ)
4
microorganism(noun, unit, sickness, bug, plague)
3
pathogen
2
bacterial
2
coccus
2
fungus
2
mold(noun, leaven)
2
spore(noun, unit, egg, microorganism)
1
acidophil
1
amebic
1
amoeba
1
anaerobe
1
antibody
1
bacterias
1
bacteriological
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APASmart Define. (2015). bacterium thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/bacterium/thesaurus/synonyms
ChicagoSmart Define. 2015. "bacterium thesaurus" https://smartdefine.org/bacterium/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, bacterium thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/bacterium/thesaurus/synonyms>.
MLASmart Define. "bacterium thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/bacterium/thesaurus/synonyms>