Find Synonyms

poisonous Synonyms

Another word for poisonous

Choosing another word for poisonous depends on context, so the 11 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Containing, producing, or having the effect of poison; capable of causing illness or death when ingested, inhaled, or absorbed.

Usage Example

"Hikers were warned not to forage for wild berries unless they could distinguish edible varieties from toxic ones."

Strongest
toxic
Strong
venomous
noxious
deadly
lethal
Weak
nocuous

• adjective (Context 2)

Extremely malicious, destructive, or harmful to morale and interpersonal relationships.

Usage Example

"The constant gossip and backstabbing created a toxic atmosphere in the office."

Strongest
toxic
Strong
malicious
malevolent
venomous
pernicious
spiteful
virulent

Opposites of poisonous

The opposite of poisonous shifts depending on context. Common opposites include:

nonpoisonous
nontoxic
harmless
wholesome
healthy
benevolent
edible
constructive
See all opposites of poisonous

• Nearby Words

poison ivy
poisoner
poisoning
poisonous
poisonously
poke
poker

Cite this Entry

Wordmom. (2026). Synonyms for Poisonous. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/poisonous
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