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 next

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 Researchers avoided contaminating the samples with other plastics by substituting standard tools with those made of aluminum, cotton and other non-plastic material, the release noted. —

Khloe Quill, FOXNews.com, 1 Mar. 2026 The Superfund designation mandates clean-up of areas heavily contaminated with hazardous waste. —

Sarah Henry, AZCentral.com, 1 Mar. 2026 And crews cannot use pressure washers or sandblasting to remove the graffiti because of concern of contaminating the beach or ocean. —

Noah Lyons, San Diego Union-Tribune, 28 Feb. 2026 Mice contaminate food, chew up everything in sight, and spread illnesses through their urine, saliva, and droppings, says Sheldon Owen, a wildlife extension specialist at West Virginia University. —

Arricca Elin Sansone, Southern Living, 27 Feb. 2026 See All Example Sentences for contaminate

Recent Examples of Synonyms for contaminate

Verb

Her absence haunts the episode, which is built around a protest against the building of a mine that could further pollute the land.

— Randall Colburn, Entertainment Weekly, 3 Mar. 2026
The settlement continues Oklahoma’s progress in holding poultry companies accountable for polluting the Illinois River Watershed, Drummond said.

— Barbara Hoberock, Oklahoman, 26 Feb. 2026