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

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Synonym Chooser

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 If a cane toad enters a bowl of pet food or water, their toxins will contaminate it, and pets can ingest the poison that way. —

Amaia Gavica, Miami Herald, 23 June 2026 During an April 2024 interview with The Sun, John revealed that he was diagnosed with toxic peripheral polyneuropathy, a condition linked to his time at Camp Lejeune, a notorious military base in North Carolina, where the water was severely contaminated in the 1980s. —

Kelsey Lentz, PEOPLE, 23 June 2026 Hantaviruses usually spread when people inhale contaminated residue of rodent droppings, but the hantavirus that caused the outbreak, called the Andes virus, may be able to spread between people in rare cases, health officials say. —

Josh Funk, Chicago Tribune, 22 June 2026 In some cases diesel fuel may accidentally mix with gasoline, or high-ethanol fuel such as E85 may contaminate regular gasoline. —

John Paul Senior Manager Public Affairs and Traffic Safety Aaa Northeast, Hartford Courant, 20 June 2026 See All Example Sentences for contaminate

Recent Examples of Synonyms for contaminate

Verb

Compared with synthetic fibers, which slough off microplastics that pollute waterways, land and air, natural fibers can be grown or raised in ways that sequester carbon, improve soil health and reduce inputs like pesticides, resulting in a lower environmental footprint, Pingree said.

— Jasmin Malik Chua, Footwear News, 22 June 2026
This is because hot sunny conditions also aid the formation of super pollutants, like tropospheric zone, black carbon and methane, which pollute the air, causing impacting human health and damage to crops.

— Jamie Hailstone, Forbes.com, 19 June 2026

Definition of pollute

Verb

The summer blockbuster, which premieres June 26, will follow Supergirl's three-day mission to obtain a cure for her superdog and friend, Krypto, who is poisoned by villainous alien Krem of the Yellow Hills (Matthias Schoenaerts).

— Jennifer Hassan, USA Today, 19 June 2026
Last year, harmful algae blooming off Southern California poisoned hundreds of dolphins and sea lions off Santa Barbara, Ventura, Los Angeles, Orange and San Diego counties, causing strandings along popular beaches.

— Paul Rogers, Mercury News, 15 June 2026