Noxious
Noxious adjective - Bad for the well-being of the body.
Usage example: mixing bleach and ammonia can cause noxious fumes that can seriously harm you
Poisonous is a synonym for noxious in health topic. In some cases you can use "Poisonous" instead an adjective "Noxious", when it comes to topics like foul, unhealthy, deadly, harmful. popular alternative
Nearby Words: noxiousness, noxiously
Poisonous
Poisonous adjective - Containing or contaminated with a substance capable of injuring or killing a living thing.
Usage example: some evil person was leaving out poisonous meat for neighborhood dogs to eat
Noxious is a synonym for poisonous in harmful topic. You can use "Noxious" instead an adjective "Poisonous", if it concerns topics such as toxic, health, foul, unhealthy. popular alternative
Mutual synonyms
Related pairs
- mortal and noxious
- mortal and poisonous
- baneful and noxious
- baneful and poisonous
- nasty and noxious
- nasty and poisonous
- dangerous and noxious
- dangerous and poisonous
- unwholesome and noxious
- unwholesome and poisonous
- unhealthy and noxious
- unhealthy and poisonous
- hurtful and noxious
- hurtful and poisonous
Both words in one sentence
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Skysurfer Strike Force has Noxious, who can spray an array of poisonous gasses from his wrist mounted gas guns.
Source: Poisonous Person -
Sesquipedalian Loquaciousness: Miasma means noxious exhalations from putrescent organic matter; poisonous effluvia or germs polluting the atmosphere.
Source: Music / The Black Dahlia Murder
Cite this Source
Poisonous and Noxious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/noxious/poisonous
Noxious & Poisonous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/noxious/poisonous>.
Poisonous or Noxious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/noxious/poisonous.
Google Ngram Viewer shows how "noxious" and "poisonous" have occurred on timeline