Word.ws English Dictionary

Synonyms of poisonous

4 similar words · 2 opposite words

Another word for poisonous is toxic. Other synonyms of poisonous are poisoned. The opposite of poisonous is nonpoisonous.

Synonyms and similar words for poisonous

adjectiveContaining sufficient poison to be dangerous to touch or ingest.

  • poisonedContaining poison; poisonous.
  • toxicHaving a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in...
  • venomousHateful; malignant; spiteful.
  • attery archaic, dialectalPoisonous; venomous.

Opposite of poisonous

adjectiveContaining sufficient poison to be dangerous to touch or ingest.

Meaning of poisonous

  1. adjective Containing sufficient poison to be dangerous to touch or ingest.
  2. adjective Of an animal such as a snake or spider, or parts of its body: producing a toxin intended for defensive or offensive use which is usually injected into an enemy or prey by biting or stinging; hence, of a bite or sting: injecting poison.
  3. adjective Negative, harmful.

Full definition of poisonous

poisonous in other languages

Questions about synonyms of poisonous

What is another word for poisonous?
Poisonous has 4 synonyms on Word.ws, such as toxic and poisoned.
What is the opposite of poisonous?
The opposite of poisonous is nonpoisonous. Other antonyms of poisonous are unpoisonous.
What does poisonous mean?
Poisonous means containing sufficient poison to be dangerous to touch or ingest.

Source and license

Adapted from Wiktionary: poisonous (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.

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Cite this page: “Synonyms of poisonous.” Word.ws, https://word.ws/synonyms/poisonous. Based on Wiktionary, CC BY-SA 4.0.