Synonyms of the word

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.

acerb

• adj. Sour, bitter, and harsh to the taste, as unripe fruit.
• adj. Sharp and harsh in expressing oneself.

acerbic

• adj. Tasting sour or bitter.
• adj. Sharp, harsh, biting.

acid

• adj. Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
• adj. (figuratively) Sour-tempered.
• adj. Of or pertaining to an acid; acidic.
• adj. (music) Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as…
• n. A sour substance.
• n. (chemistry) Any of several classes of compound having the following properties:-.
• n. (slang) lysergic acid diethylamide (LSD).

acrid

• adj. Sharp and harsh, or bitter and not to the taste; pungent.
• adj. Causing heat and irritation; corrosive.
• adj. Caustic; bitter; bitterly irritating.

bitter

• adj. Having an acrid taste (usually from a basic substance).
• adj. Harsh, piercing or stinging.
• adj. Hateful or hostile.
• adj. Cynical and resentful.
• n. (usually in the plural bitters) A liquid or powder, made from bitter herbs, used in mixed drinks or as…
• n. A type of beer heavily flavored with hops.
• n. (nautical) A turn of a cable about the bitts.
• v. To make bitter.
• n. (computing, informal, in combination) A hardware system whose architecture is based around units of the…

blistering

• v. present participle of blister.
• adj. Causing blisters.
• adj. Very hot.
• adj. Harsh or corrosive.
• adj. Very aggressive.
• adj. Very fast.
• n. (medicine, veterinary) The practice of forming blisters on the skin, to promote blood flow and aid healing.

caustic

• adj. Capable of burning, corroding or destroying organic tissue.
• adj. (of language, etc.) Sharp, bitter, cutting, biting, and sarcastic in a scathing way.
• n. Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys…
• n. (optics, computer graphics) The envelope of reflected or refracted rays of light for a given surface or…
• n. (mathematics) The envelope of reflected or refracted rays for a given curve.
• n. (informal, chemistry) Caustic soda.

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.

sulfurous

• adj. Containing sulfur.
• adj. (chemistry) Of, or relating to sulfur, especially in its lower oxidation state.

sulphurous

• adj. (chiefly British spelling) Alternative spelling of sulfurous.

toxic

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

unpleasant

• adj. Not pleasant.

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.

vitriolic

• adj. (chemistry, dated) Of or pertaining to vitriol; derived from or resembling vitriol; vitriolous.
• adj. (figuratively) Bitterly scathing, caustic.