3
pestilent(adjective, unhealthy, dangerous)
3
septic(adjective, unhealthy)
2
baneful(adjective, baneful)
2
destructive
2
transferable(adjective, catching, toxic, spreading, infectious)
2
virulent
2
unhealthy(adjective, unhealthy)
2
unwholesome(adjective, unhealthy)
2
venomous
1
inoculable(adjective, communicable)
1
ancestral
1
diseased(adjective, unhealthy)
1
ill(adjective, baneful)
1
impartible(adjective, communicable)
1
mailable
1
malign
1
mephitic
1
miasmatic
1
movable
1
pandemic(adjective, widespread, catching, wide-ranging, infectious)
11 years ago|8.7k views|share |citing 
APASmart Define. (2015). contagious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/contagious/thesaurus/synonyms
ChicagoSmart Define. 2015. "contagious thesaurus" https://smartdefine.org/contagious/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, contagious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/contagious/thesaurus/synonyms>.
MLASmart Define. "contagious thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/contagious/thesaurus/synonyms>