Synonyms for noxious
- adjective
Most common
harmful poisonous pernicious injurious deadly lethal deleterious baneful
All synonyms
Adjective
harmful, noisome formal, pernicious, injurious, poisonous, deadly, deleterious, baneful, bad, lethal, pestilential, destructive, detrimental, hurtful, mischievous, unwholesome, unhealthful, baleful, vicious, evil, unhealthy, damaging, prejudicial, ruinous, scathing, pestilent, insalubrious, mephitic, miasmatic, pestiferous, morbific, malevolent, malignant, malicious, malign, wicked, iniquitous, disadvantageous, malefic, venomous dated
Definitions
- adj. 1
Harmful; injurious.
Choose the right word
Noisome now always denotes that which is extremely disagreeable or disgusting, especially to the sense of smell; as, the noisome stench proclaimed the presence of noxious gases.
J. C. Fernald, English Synonyms and Antonyms (1914)
Example sentences
- harmful There's no denying the harmful effects of smoking.
- poisonous It was once believed that tomatoes were poisonous.
- pernicious A half-truth is more pernicious than a lie.
- injurious The argument that smoking is injurious has become accepted.
- deadly Sloth or laziness is one of the seven deadly sins.
- lethal Pufferfish can be lethal if not prepared properly.
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| noxious | steady | |
| harmful | steady | |
| poisonous | steady | |
| pernicious | steady | |
| injurious | falling | |
| deadly | rising |
Use in printed books, per decade from 1850 to 2019.
By length
- 3 letters
- bad1
- 4 letters
- evil2
- 6 letters
- deadly2, wicked2, lethal2, malign2
- 7 letters
- harmful2, vicious2, hurtful2, ruinous3, baleful2, malefic, noisome, baneful
- 8 letters
- damaging3, venomous3, scathing2, mephitic, morbific
- 9 letters
- unhealthy3, malicious3, poisonous3, malignant3, injurious4, pestilent, miasmatic
- 10 letters
- pernicious3, malevolent4, iniquitous
- 11 letters
- destructive3, detrimental4, mischievous3, deleterious5, prejudicial4, unwholesome, unhealthful3, pestiferous
- 12 letters
- pestilential, insalubrious
- 15 letters
- disadvantageous5
The small number after each word is its number of syllables (evil2 = 2 syllables).