Find Synonyms

noxious Synonyms

Another word for noxious

Choosing another word for noxious depends on context, so the 15 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Harmful, poisonous, or very unpleasant to living beings, especially regarding physical health or the environment.

Usage Example

"Workers wore protective respirators to avoid inhaling the toxic fumes escaping from the chemical plant."

Strongest
toxic
poisonous
nocuous
harmful
Strong
injurious
deleterious
pernicious
noisome
pestilential
unhealthy

• adjective (Context 2)

Corrupting, destructive, or harmful to the mind, morals, or social well-being.

Usage Example

"The historian argued that the pamphlet spread pernicious ideologies that undermined public trust in democratic institutions."

Strongest
pernicious
corrupting
Strong
toxic
baneful
destructive
detrimental
malicious

Opposites of noxious

The opposite of noxious shifts depending on context. Common opposites include:

harmless
innocuous
non-toxic
edifying
wholesome
salubrious
healthful
constructive
See all opposites of noxious

• Nearby Words

nowheresville
nowt
nox
noxious
noxiously
nozzle
nth

Cite this Entry

Wordmom. (2026). Synonyms for Noxious. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/noxious
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