Noxious
Noxious adjective - Causing or capable of causing harm.
Usage example: noxious smog that for years has been encrusting the historic cathedral with soot
Ruinous is a synonym for noxious in baneful topic. In some cases you can use "Ruinous" instead an adjective "Noxious", when it comes to topics like deleterious.
Nearby Words: noxiousness, noxiously
Ruinous
Ruinous adjective - Bringing about ruin or misfortune.
Usage example: a ruinous miscalculation of the financial markets left them bankrupt
Noxious is a synonym for ruinous in baneful topic. Sometimes you can use "Noxious" instead an adjective "Ruinous", if it concerns topics such as disastrous, deleterious, destructive.
Mutual synonyms
Cite this Source
Ruinous and Noxious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/noxious/ruinous
Noxious & Ruinous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/noxious/ruinous>.
Ruinous or Noxious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/noxious/ruinous.
Google Ngram Viewer shows how "noxious" and "ruinous" have occurred on timeline