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Definition of decaynext
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as in decomposition
the process by which dead organic matter separates into simpler substances the cycle by which the decay of dead plants on the forest floor provides soil and nutrients for the next generation of plants

Synonyms & Similar Words

Antonyms & Near Antonyms

decay

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verb

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Synonym Chooser

How is the word decay different from other verbs like it?

Some common synonyms of decay are decompose, putrefy, rot, and spoil. While all these words mean "to undergo destructive dissolution," decay implies a slow change from a state of soundness or perfection.

a decaying mansion

Where would decompose be a reasonable alternative to decay?

While the synonyms decompose and decay are close in meaning, decompose stresses a breaking down by chemical change and when applied to organic matter a corruption.

the strong odor of decomposing vegetation

In what contexts can putrefy take the place of decay?

In some situations, the words putrefy and decay are roughly equivalent. However, putrefy implies the rotting of animal matter and offensiveness to sight and smell.

corpses putrefying on the battlefield

How are the words rot and decompose related as synonyms of decay?

Rot is a close synonym of decompose and often connotes foulness.

fruit was left to rot in warehouses

When is spoil a more appropriate choice than decay?

The meanings of spoil and decay largely overlap; however, spoil applies chiefly to the decomposition of foods.

keep the ham from spoiling

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 decay
Noun
The weather is humid and in some areas, there is already a strong smell of decay, raising fears of a growing public health crisis. Fernando Narro Roman, NPR, 28 June 2026 At age 11, my favorite Broadway show was Follies – a classic preteen tale about the decay of female beauty and fading fame within an unscrupulous industry of vaudeville and burlesque. Greg Evans, Deadline, 27 June 2026
Verb
Europe will not be able to defend itself militarily if democracy decays internally. Wendell Wallach, Hartford Courant, 25 June 2026 Many windows are shattered or boarded over with decaying plywood. Susan Svrluga, Washington Post, 24 June 2026 See All Example Sentences for decay
Recent Examples of Synonyms for decay
Noun
  • The National Institute of Standards and Technology said long-term corrosion and the failure of multiple slab-to-column connections likely contributed to a progressive collapse after weeks of structural deterioration.
    Sergio Candido, CBS News, 24 June 2026
  • Heston is at his most gleefully cynical as Robert Thorn, a police detective who lives and works in a New York City decimated by environmental deterioration and dwindling resources.
    Jim Hemphill, IndieWire, 23 June 2026
Noun
  • Authorities also found numerous dead animals in advanced stages of decomposition, including hundreds of chickens that investigators said had been discarded in bags and fed to the dogs, according to The Straits Times and The Standard.
    Moná Thomas, PEOPLE, 2 July 2026
  • Investigators also found additional remains in advanced stages of decomposition, the sheriff’s office said.
    ABC News, ABC News, 28 June 2026
Verb
  • Keep the mulch a few inches away from the trunk to prevent rot.
    SJ McShane, Martha Stewart, 27 June 2026
  • The old deck was rotting and had trees growing up through it.
    Doug Ross, Chicago Tribune, 27 June 2026
Verb
  • England reached stumps on 103-4 after 15 overs, still needing 270 runs in its seemingly forlorn chase of 373 to win on a deteriorating pitch and heading for a first defeat in a home series of three or more tests since 2012.
    ABC News, ABC News, 28 June 2026
  • Intensifying wildfires across eastern Utah and western Colorado are sending thick smoke into portions of the state, creating hazy skies and deteriorating air quality for many mountain and western Colorado communities.
    Callie Zanandrie, CBS News, 28 June 2026
Verb
  • But rental business owners like Zhao observed that the rental prices have begun to slide as novelty surrounding these stunt-performing androids fades.
    John Liu, CNN Money, 30 June 2026
  • The combination of hyaluronic and azelaic acid does wonders to fade dark spots, soothe redness, and deeply hydrate.
    Olivia Dubyak, InStyle, 30 June 2026
Noun
  • Press freedoms across Africa are already fragile, with most nations ranking in the lower half of an influential press freedoms index, while numerous recent coups have contributed to a weakening of democratic norms in parts of the continent.
    Jenny Vaughan, semafor.com, 29 June 2026
  • One of the most significant changes during Hill’s tenure was the weakening of structures designed to elevate teacher concerns to district leadership, Oreskovic said.
    Nora O'Neill, Charlotte Observer, 19 June 2026
Verb
  • The Yolo County Central Landfill will build a new system that will convert methane from decomposing waste into renewable natural gas, the county announced Tuesday.
    Daniel Lempres, Sacbee.com, 30 June 2026
  • The ocean becomes a creamy expanse splotched with brown mats of decomposing algae, according to photos shared by Abrams.
    Bill Kearney, Sun Sentinel, 28 June 2026
Verb
  • Jan Paul van Hecke of the Netherlands has been involved in two scraps already, the latest when he was hit while going for a header and crumbled, perhaps exaggerating a tad, after Morocco's Azzedine Ounahi challenged the header, as well.
    Andrew Greif, NBC news, 30 June 2026
  • Survivors say that doors to the facility were locked and that migrants were left to die inside crumbling walls.
    Kate Linthicum, Los Angeles Times, 30 June 2026

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Cite this Entry

“Decay.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/decay. Accessed 6 Jul. 2026.

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