venomous

adjective

1 black mambas are among the most venomous snakes in the world:

poisonous, toxic, noxious, dangerous, harmful;

deadly, lethal, death-dealing, life-threatening, fatal, mortal, terminal, killing;

literary deathly, nocuous, mephitic;

archaic baneful.

▷antonyms harmless, innocuous.

2 the porter threw a venomous look at Ralf:

vicious, spiteful;

rancorous, malevolent, vitriolic, vindictive, malicious, malignant, malign, poisonous, baleful, bitter, acrimonious, resentful, grudging, virulent, pernicious, antagonistic, hostile, hate-filled, menacing, nasty, evil, evil-intentioned, unfriendly, cruel, unkind, unpleasant;

acerbic, sharp, acid, tart, caustic, astringent, cutting, biting, razor-edged, waspish, wounding, barbed;

informal bitchy, catty;

literary malefic, maleficent.

▷antonyms friendly, benevolent, kind.