Part of speech:
Harmful often in a subtle or unexpected way (as for example deleterious effects, deleterious to health).
Of, affected by, or caused by a toxin, or poison
Secreting and transmitting venom:
Harmful or dangerous:
Irritable or upset:
Causing or capable of causing harm; injurious.
Of, relating to, or designed for attack:
Made weak or unsound by rot:
Extreme or terrible:
Containing or being a poison:
Causing danger; ready to do harm or injury.
Designed or tending to disprove or discredit:
Characterized by or indicating future misfortune; ominous:
Having an offensive odor.
Causing pain or suffering, especially of a psychological nature.
Causing or capable of causing death; fatal or deadly
Guilty or criminal
Engaged in revolt; rebellious
Offensive, disgusting, etc.
Of a risky nature; dangerous:
Giving help; of service; useful
Tending to improve the mind or character
Tending to promote or preserve health.
Not able to produce offspring, seeds, or fruit; unable to reproduce.
(Philosophy) Free of empirical elements:
Not controversial, offensive, or stimulating; dull and uninspiring
Virulent or threatening to life:
(Archaic) harmful to morals or public order.
Pernicious; dangerous; harmful
Extremely destructive or harmful
Find another word for noxious. In this page you can discover 45 synonyms, antonyms, idiomatic expressions, and related words for noxious, like: pernicious, deleterious, toxic, virulent, venomous, noisome, foul, putrid, harmful, offensive and rotten.