CONTAMINATE Synonyms: 40 Similar and Opposite Words

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

Some common synonyms of contaminate are defile , pollute , and taint . While all these words mean "to make impure or unclean," contaminate implies intrusion of or contact with dirt or foulness from an outside source. // water contaminated by industrial wastes

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

Although the words defile and contaminate have much in common, 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 'pollute' a more appropriate choice than 'contaminate'?

The synonyms pollute and contaminate are sometimes interchangeable, but 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 is it sensible to use 'taint' instead of 'contaminate'?

The words taint and contaminate are synonyms, but do differ in nuance. Specifically, taint stresses the loss of purity or cleanliness that follows contamination. // tainted meat // a politician's tainted reputation

contaminate

verb

kən-ˈta-mə-ˌnāt

Definition of contaminate

as in to pollute

to make unfit for use by the addition of something harmful or undesirable a supply of drinking water that was contaminated by a toxic waste dump

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How does the verb contaminate contrast with its synonyms?

Some common synonyms of contaminate are defile, pollute, and taint. While all these words mean "to make impure or unclean," contaminate implies intrusion of or contact with dirt or foulness from an outside source.

water contaminated by industrial wastes

When can defile be used instead of contaminate?

Although the words defile and contaminate have much in common, 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 pollute a more appropriate choice than contaminate?

The synonyms pollute and contaminate are sometimes interchangeable, but 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 is it sensible to use taint instead of contaminate?

The words taint and contaminate are synonyms, but do differ in nuance. Specifically, 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 contaminate As a result, a case reported today does not necessarily mean the person ate contaminated lettuce recently. — Jacqueline Howard, CNN Money, 31 Aug. 2026 That leaves a short window during which malicious activity can contaminate the prediction machinery again. — Atharva Gosavi, Interesting Engineering, 28 Aug. 2026 So far, three dogs have fallen ill after eating contaminated Oma’s Pride food. — Julia Hawkins, Sacbee.com, 27 Aug. 2026 Last week, the Food and Drug Administration issued its highest urgency warning for frozen blueberries believed to be contaminated with E coli. — Dylan Scott, Vox, 27 Aug. 2026 See All Example Sentences for contaminate

Recent Examples of Synonyms for contaminate

Verb

Environmental groups advocated for SB 954 over concerns that the CEQA exemption could allow heavily polluting facilities to bypass environmental review.

— Naomi Taxay, Sacbee.com, 29 Aug. 2026
The usual analogy is that generative AI and LLMs are akin to a factory that pollutes local waters.

— Lance Eliot, Forbes.com, 19 Aug. 2026

Definition of pollute

Verb

Veterinarians determined that the snake's venom poisoned Samba, prompting them to give her antivenin.

— Anthony Thompson, USA Today, 28 Aug. 2026
Glutathione is processed in sterile compounding pharmacies, and there have been cases of people getting poisoned due to contamination at these facilities, Sack said.

— ABC News, ABC News, 23 Aug. 2026

Definition of poison

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“Contaminate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/contaminate. Accessed 5 Sep. 2026.

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Synonyms of contaminate

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