Synonyms of toxic in English:

toxic


See US English definition of toxic

See UK English definition of toxic

See Spanish definition of tóxico

adjective

1‘they were killed by smoke and toxic gases’

SYNONYMS
poisonous, venomous, virulent, noxious, dangerous, destructive, harmful, unsafe, malignant, injurious, pestilential, pernicious, environmentally unfriendly
fatal, deadly, lethal, mortal, death-dealing
archaic baneful
ANTONYMS

non-toxic, harmless, safe