Beneficial
Beneficial adjective - Promoting or contributing to personal or social well-being.
Poisonous is an antonym for beneficial.
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
Beneficial is an antonym for poisonous.
Both words in one sentence
- When you don't want to use electricity, radiation, or tweaking something's DNA, just dump the issue you need into a pool of what is SUPPOSED to be deadly poisonous; whatever comes out will surely have more beneficial changes than negative.
Source: Toxic Waste Can Do Anything
Cite this Source
Poisonous and Beneficial. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/beneficial/poisonous
Beneficial & Poisonous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/beneficial/poisonous>.
Poisonous or Beneficial. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/beneficial/poisonous.
Google Ngram Viewer shows how "beneficial" and "poisonous" have occurred on timeline