30 entries under noun topic. ×

13
virus(illness, sickness, bug, germ)
11
microbe(illness, sickness, germ, microorganism)
10
germ(illness, sickness, microorganism, bacteria)
9
bacterium(illness, sickness, germ, microorganism)
7
bacteria(bug, microorganism)
5
bacilli
5
bug(illness, sickness, germ, microorganism)
4
B
4
microorganism(illness, sickness, germ, microorganism)
3
amoeba
3
protozoa
1
animalcule
1
barn
1
bel
1
boron
1
dyad
1
mastigopod
1
micrococcus
1
microphyte
1
microspore
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APASmart Define. (2015). bacillus thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/bacillus/thesaurus/synonyms
ChicagoSmart Define. 2015. "bacillus thesaurus" https://smartdefine.org/bacillus/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, bacillus thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/bacillus/thesaurus/synonyms>.
MLASmart Define. "bacillus thesaurus" 10 December 2015. Web. 24 September 2026. <https://smartdefine.org/bacillus/thesaurus/synonyms>