1
as in maintenance
the act or activity of keeping something in an existing and usually satisfactory condition argues that a new toll is needed to pay for the long-term sustentation of the city's bridges

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2
as in preservation
the careful maintaining and protection of something valuable especially in its natural or original state the all-important sustentation of Mount Vernon, Monticello, and other national treasures

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Example Sentences

Recent Examples of Synonyms for sustentation
Noun
  • This capability could be invaluable for aerospace maintenance and other precision tasks.
    Neetika Walter, Interesting Engineering, 16 Oct. 2025
  • Civilians working in cybersecurity, medical care, weapons systems maintenance, intelligence, and logistics are still working and are not included in Trump’s order to pay active-duty personnel.
    Terry Moseley, USA Today, 15 Oct. 2025
Noun
  • But no matter the understanding of offenses or talent preservation, a freshman’s ability to play all comes down to talent, and Brown and Wilson ooze ability.
    Noah White, Miami Herald, 19 Oct. 2025
  • One of the groups that has done the most cultural-preservation work is Plast, the main Ukrainian Scouting organization, which has expanded its efforts to serve Ukrainian children since the 2022 invasion.
    Robert F. Worth, The Atlantic, 19 Oct. 2025
Noun
  • There are solutions for age verification that are both accurate and privacy preserving.
    Annie Chestnut Tutor, Boston Herald, 18 Aug. 2025
Noun
  • The aquarium met and surpassed its goal to raise the funds for its sea otter conservation program in less than eight hours, averaging about $100,000 in sales every 15 minutes, MacDonald said.
    Emma Burleigh, Fortune, 18 Oct. 2025
  • Just by wearing an aquarium’s T-shirt in a small snippet of her The Release Party of a Showgirl film, the pop star inspired countless fans to seek one out for themselves — raising $2 million for otter conservation in the process.
    Hannah Dailey, Billboard, 17 Oct. 2025
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.

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Cite this Entry

“Sustentation.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sustentation. Accessed 20 Oct. 2025.

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