Synonyms|77Antonyms|5|Broader|0Narrower|0Related|154
10
infectious(adjective, catching, poisonous, spreading, transferable)
5
contagious
5
morbific
5
poisonous(adjective, harmful)
4
catching
4
communicable
4
pathogenic
4
virulent(adjective, poisonous, lethal)
3
deadly
3
epidemic
3
pestiferous
3
taking
3
venomous
2
contaminative
2
destructive
2
malign
2
malignant
2
miasmic(adjective, catching, toxic, spreading, transferable)
2
septic
2
toxic
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APASmart Define. (2015). infective thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/infective/thesaurus/synonyms
ChicagoSmart Define. 2015. "infective thesaurus" https://smartdefine.org/infective/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, infective thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/infective/thesaurus/synonyms>.
MLASmart Define. "infective thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/infective/thesaurus/synonyms>