Keep
Keep noun - The act or activity of keeping something in an existing and usually satisfactory condition.
Usage example: the keep of the stable is mainly left to the two equine-loving daughters
Sustaining and keep are semantically related. In some cases you can use "Sustaining" instead a noun "Keep".
Sustaining
Keep and sustaining are semantically related. Sometimes you can use "Keep" instead the word "Sustaining" as a noun or a verb.
Mutual synonyms
Both words in one sentence
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Morton's Fork: Future Tom's efforts to keep the tree alive while sustaining himself off it.
Source: Film / The Fountain -
The sustaining pedal on the piano (the one that holds notes down without having to keep your fingers on the keys) became popular.
Source: Classical Music - In Desert Punk, the Oasis Government does the bare minimum to keep life in the Great Kanto Desert inhabitable and otherwise only cares about sustaining itself.
Source: Not in This for Your Revolution
Cite this Source
Sustaining and Keep. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/keep/sustaining
Keep & Sustaining. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/keep/sustaining>.
Sustaining or Keep. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/keep/sustaining.
Google Ngram Viewer shows how "keep" and "sustaining" have occurred on timeline