Synonyms of the word

toxic

• adj. (toxicology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering…
• adj. (figuratively) negative, harmful.

cyanogenetic

• adj. Giving rise to cyanide.

cyanogenic

• adj. Alternative form of cyanogenetic.

deadly

• adj. (obsolete) Subject to death; mortal.
• adj. Causing death; lethal.
• adj. Aiming or willing to destroy; implacable; desperately hostile.
• adj. (by extension) Very accurate (of aiming with a bow, firearm, etc.).
• adj. (informal) Very boring.
• adj. (informal) Excellent, awesome, cool.
• adv. (obsolete) Fatally, mortally.
• adv. In a way which suggests death.
• adv. Extremely.

harmful

• adj. of a kind likely to be damaging; injurious.

hepatotoxic

• adj. toxic to the liver; causing hepatotoxicity.

nephrotoxic

• adj. that is poisonous to kidney tissue.

noxious

• adj. Harmful; injurious.

ototoxic

• adj. Causing ototoxicity.

poisonous

• adj. Containing sufficient poison to be dangerous.
• adj. (of an animal) Inedible due to containing poison; poisonous to eat.

toxicant

• adj. Capable of causing damage by poisoning.
• n. A toxic or poisonous substance.

unhealthful

• adj. Not healthy; detrimental to health.

venomous

• adj. Full of venom.
• adj. Toxic; poisonous.
• adj. Noxious; evil.
• adj. Malignant; spiteful; hateful.
• adj. Producing venom (poison usually injected into an enemy or prey by biting or stinging) in glands or accumulating…
• adj. powerful.

virulent

• adj. (chiefly medicine, of a disease or disease-causing agent) Highly infectious, malignant, or deadly.
• adj. Hostile to the point of being venomous; intensely acrimonious.