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 To add to the dire situation, up to 80% of large parts of the city’s groundwater is contaminated, both by sewage and by naturally occurring substances such as arsenic. — Laura Paddison, CNN Money, 6 Oct. 2026 Such environments can remain unstable, contaminated and dangerous after an explosion. — Jijo Malayil, Interesting Engineering, 5 Oct. 2026 At a press conference on Wednesday, immigrant rights groups and attorneys denounced the facility and raised concerns that the property was contaminated with PFAS. — Armando Garcia, ABC News, 2 Oct. 2026 This process handles mixed, blended, and contaminated materials much better than mechanical recycling. — Cleo Levin, Footwear News, 30 Sep. 2026 See All Example Sentences for contaminate

Recent Examples of Synonyms for contaminate

Verb

In a world riven by democratic backsliding and polluted with AI slop, there’s something seductive about the idea of retreating to a wild, unnavigable place where no one can follow you—because you’ll be submerged up to your eyeballs.

— Literary Hub, Literary Hub, 15 Oct. 2026
Throwing a piece of garbage out of the window affects every Texan, polluting water and soil and affecting wildlife.

— Katie Standing, CBS News, 14 Oct. 2026

Definition of pollute

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

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Synonyms of contaminate

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