22
toxicity(noun, unhealthiness, insalubrity)
21
insalubrity(noun, unhealthiness, toxicity)
20
unhealthiness(noun, unhealthiness, insalubrity, toxicity)
19
contagiousness(noun, unhealthiness, insalubrity, toxicity)
19
contamination(noun, unhealthiness, insalubrity, toxicity)
8
deadliness(noun, loss, disaster, death, casualty)
8
harmfulness(noun, venomousness, deadliness, toxicity)
8
virulence(noun, loss, disaster, death, casualty)
7
lethality(noun, loss, disaster, death, casualty)
7
poisonousness(noun, loss, disaster, death, casualty)
6
fatality(noun, ability, loss, disaster, death)
5
harm(noun, damage, evil, destruction, immorality)
5
malignancy(noun, unhealthiness)
5
noisomeness
4
accident(noun, loss, disaster, death, casualty)
4
casualty(noun, loss, disaster, death, fatality)
4
disaster(noun, loss, death, casualty, fatality)
4
dying(noun, loss, disaster, death, casualty)
4
mortality(noun, loss, disaster, death, casualty)
3
wickedness(noun, wrong, damage, evil, harm)
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APASmart Define. (2015). noxiousness thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/noxiousness/thesaurus/synonyms
ChicagoSmart Define. 2015. "noxiousness thesaurus" https://smartdefine.org/noxiousness/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, noxiousness thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/noxiousness/thesaurus/synonyms>.
MLASmart Define. "noxiousness thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/noxiousness/thesaurus/synonyms>