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 Even in elevated homes, that much water can damage equipment and contaminate water systems. —

Dominic Boyer, The Conversation, 14 Apr. 2026 When these animals urinate, bacteria contaminate the environment. —

The Washington Post, San Diego Union-Tribune, 14 Apr. 2026 The storm moved through the islands earlier last week, bringing heavy rainfall and runoff that has kept coastal waters contaminated in several areas, the Hawaii Department of Health Clean Water Branch said. —

Kelly McGreal, FOXNews.com, 14 Apr. 2026 In 2024, state investigators found that one popular brand of marijuana vapes sold in dispensaries was not only derived from hemp, but also contaminated with methylene chloride, a chemical often used to convert CBD from hemp into THC. —

Christopher Osher, ProPublica, 14 Apr. 2026 See All Example Sentences for contaminate

Recent Examples of Synonyms for contaminate

Verb

Many residents from rural areas have lived on the same land for generations, watching a cycle of outside companies profit from extracting the state's resources — from timber to coal and oil and gas — only to pollute and abandon communities afterward.

— CBS News, CBS News, 11 Apr. 2026
Many residents from rural areas have lived on the same land for generations, watching a cycle of outside companies profit from extracting the state’s resources — from timber to coal and oil and gas — only to pollute and abandon communities afterward.

— Margie Mason, Los Angeles Times, 11 Apr. 2026