decay 1 of 2

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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
Fluoride is a naturally occurring substance that helps to prevent tooth decay by strengthening and rebuilding weakened tooth enamel. Nathaniel Weixel, The Hill, 15 May 2025 Scientists and medical experts have sharply criticized Kennedy's views, arguing they are not backed by enough scientific evidence and could undermine public health initiatives to prevent tooth decay. Sonam Sheth, MSNBC Newsweek, 13 May 2025
Verb
All of this allows Lithgow and Rush to take this decaying senior rivalry to the heights, even veering into campiness as Lithgow stages a musical performance of a children’s song with Jenny as his partner. Pete Hammond, Deadline, 6 Mar. 2025 Each probe is powered by three radioisotope thermoelectric generators (RTGs) fueled by decaying plutonium-238. Andrew Paul, Popular Science, 5 Mar. 2025 See All Example Sentences for decay
Recent Examples of Synonyms for decay
Noun
  • Sulzberger writes passionately about the existential threats facing a free press, from economic collapse to political intimidation, and how journalism must stand as a bulwark in a time of profound civic deterioration.
    Jessica Sibley, Time, 19 May 2025
  • On modern iPhones, Apple has a feature called Charge Limit that works as an opt-in feature limiting your phone to 80% charge to help reduce the deterioration of the battery.
    James Peckham, PC Magazine, 13 May 2025
Verb
  • The rotting teeth of our children because of this fluoride ban is a metaphor for the rot in our government.
    Sun Sentinel Editorial Board, Sun Sentinel, 15 May 2025
  • Watering them during this time can cause the bulbs to rot, especially in warm, humid conditions.
    Leanne Potts, Better Homes & Gardens, 15 May 2025
Verb
  • While more durable than the original Irish linen that encased the wings when the KC Eaglet rolled out of the factory on Aug. 12, 1930, all fabrics will deteriorate over time from exposure to the sun.
    Mike Hendricks, Kansas City Star, 21 May 2025
  • Their mental health deteriorated, which reinforced the officer’s excuse to keep them deadlocked.
    Justyna Rzewinski, New York Daily News, 21 May 2025
Verb
  • Advisors who can build trust and act as a central coordinator for these services are invaluable—and often become long-term partners even after the spotlight fades.
    Jason Katz, Forbes.com, 18 May 2025
  • As threats from insurgents faded, crackdowns by an authoritarian government surged.
    Mitra Taj, New York Times, 17 May 2025
Verb
  • The company suggests that AWS Transform can decompose monolithic z/OS COBOL applications into components that can be run in the cloud.
    Adrian Bridgwater, Forbes.com, 17 May 2025
  • The smell, an odor like rotten eggs, is the sargassum piles decomposing, according to the National Oceanic and Atmospheric Administration.
    Mitchell Willetts, Fort Worth Star-Telegram, 30 Apr. 2025
Verb
  • Old systems are crumbling under the pressure of new conditions.
    Kian Bakhtiari, Forbes.com, 25 May 2025
  • For the characters who remain, there’s a sense that the world’s well of meaning has run dry; the old institutions have crumbled, and no one is coming to save us.
    Katy Waldman, New Yorker, 24 May 2025
Verb
  • In Colorado, for example, several AI companies recently lobbied to delay and weaken the state’s landmark AI accountability legislation — a preview of what unchecked industry influence could look like under a regulatory freeze.
    Anisha Sircar, Forbes.com, 22 May 2025
  • Their backing from the youngest voters weakened in 2024 (Catalist).
    Nick Mordowanec, MSNBC Newsweek, 21 May 2025
Verb
  • Mohammadi works with materials that disintegrate, for instance halva, soap, letting their ephemerality echo the fragility of memory.
    Nargess Banks, Forbes.com, 26 May 2025
  • Toward the end of the movie, Bob’s house of shame disintegrates.
    Katy Waldman, New Yorker, 24 May 2025

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Cite this Entry

“Decay.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/decay. Accessed 31 May. 2025.

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