Part of speech:
Prevalent and spreading rapidly among many individuals in a community at the same time
The definition of noxious is something very unpleasant or something poisonous.
Morally evil or deadly; pernicious.
Pernicious; dangerous; harmful
Capable of injuring or killing by or as by poison; containing, or having the effects of, a poison; toxic; venomous
(in combination) That has been transmitted in a specific manner.
Devoid of enlivening or enriching qualities:
Not causing or incapable of causing harm.
Capable of transmission by infection
(Usage Problem) Inevitable or inexorable.
Find another word for infectious. In this page you can discover 25 synonyms, antonyms, idiomatic expressions, and related words for infectious, like: catching, communicable, transmissible, contagious, dangerous, epidemic, noxious, pestiferous, pestilential, poisonous and spreading.