POLLUTE Synonyms: 40 Similar and Opposite Words

Q: How does the verb 'pollute' contrast with its synonyms?

Some common synonyms of pollute are contaminate , defile , and taint . While all these words mean "to make impure or unclean," pollute , sometimes interchangeable with contaminate , distinctively may imply that the process which begins with contamination is complete and that what was pure or clean has been made foul, poisoned, or filthy. // the polluted waters of the river

Q: When can 'contaminate' be used instead of 'pollute'?

The words contaminate and pollute can be used in similar contexts, but contaminate implies intrusion of or contact with dirt or foulness from an outside source. // water contaminated by industrial wastes

Q: When is 'defile' a more appropriate choice than 'pollute'?

The words defile and pollute are synonyms, but do differ in nuance. Specifically, defile implies befouling of what could or should have been kept clean and pure or held sacred and commonly suggests violation or desecration. // defile a hero's memory with slanderous innuendo

Q: When is it sensible to use 'taint' instead of 'pollute'?

The synonyms taint and pollute are sometimes interchangeable, but taint stresses the loss of purity or cleanliness that follows contamination. // tainted meat // a politician's tainted reputation

pollute

verb

pə-ˈlüt

Definition of pollute

as in to contaminate

to make unfit for use by the addition of something harmful or undesirable outmoded factories polluting the air

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How does the verb pollute contrast with its synonyms?

Some common synonyms of pollute are contaminate, defile, and taint. While all these words mean "to make impure or unclean," pollute, sometimes interchangeable with contaminate, distinctively may imply that the process which begins with contamination is complete and that what was pure or clean has been made foul, poisoned, or filthy.

the polluted waters of the river

When can contaminate be used instead of pollute?

The words contaminate and pollute can be used in similar contexts, but contaminate implies intrusion of or contact with dirt or foulness from an outside source.

water contaminated by industrial wastes

When is defile a more appropriate choice than pollute?

The words defile and pollute are synonyms, but do differ in nuance. Specifically, defile implies befouling of what could or should have been kept clean and pure or held sacred and commonly suggests violation or desecration.

defile a hero's memory with slanderous innuendo

When is it sensible to use taint instead of pollute?

The synonyms taint and pollute are sometimes interchangeable, but taint stresses the loss of purity or cleanliness that follows contamination.

tainted meat

a politician's tainted reputation

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of pollute Years ago, William had plotted to pollute the the ley lines — the source of all witches and warlocks’ magical powers — which was foiled by a Mary, Graves and their coven sister Tamora (Keegan Connor Tracy). — Mya Copeland, Variety, 5 Oct. 2026 Wastewater injection operations are banned within a half-mile of public water wells unless regulators hold a hearing to ensure that this activity will not pollute groundwater. — Nick Bowlin, ProPublica, 5 Oct. 2026 That’s what the GOP does by deregulating and lowering environmental standards so energy companies can pollute our air and water with no regard for the citizens. — Sun Sentinel Editorial Board, Sun Sentinel, 2 Oct. 2026 Open Mind was designed to show readers views that challenged the material polluting their feeds. — Nick Lichtenberg, Fortune, 2 Oct. 2026 See All Example Sentences for pollute

Recent Examples of Synonyms for pollute

Verb

These measures reduce the risk that their microbe might contaminate the Red Planet as an invasive organism, especially if Mars ever did develop life of its own that might still exist in underground aquifers or within ancient salt crystals.

— Charles Q. Choi, Space.com, 9 Oct. 2026
Lincoln Park Zoo sits atop a former burial ground, Chicago City Cemetery, which was moved in the 1860s amid concerns that the graves were contaminating the water supply.

— Jennifer Day, Chicago Tribune, 8 Oct. 2026

Definition of contaminate

Verb

What researchers uncovered through lab testing and surveillance footage, prosecutors said, was a plot by his fellow graduate student to intentionally poison him.

— Eduardo Cuevas, CNN Money, 17 Oct. 2026
May says national polarization is poisoning the atmosphere locally.

— Stuart Miller, Los Angeles Times, 16 Oct. 2026

Definition of poison

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pollutants

pollute

polluted

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“Pollute.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/pollute. Accessed 20 Oct. 2026.

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