Synonyms for poisonous

Adjective

1. poisonous, toxicant, toxic (vs. nontoxic)

usage: having the qualities or effects of a poison

2. poisonous, inedible (vs. edible), uneatable

usage: not safe to eat

3. poisonous, venomous, vicious, malevolent (vs. benevolent), malicious

usage: marked by deep ill will; deliberately harmful; "a malevolent lie"; "poisonous hate...in his eyes"- Ernest Hemingway; "venomous criticism"; "vicious gossip"