240 entries under sustain topic. ×

13
support(noun, verb, hold, keep, maintain)
12
carry on(verb, expression, phrasal verb, support, take)
11
continue(verb, support, take, advance, keep)
11
maintain(verb, support, hold, take, help)
11
preserve(verb, support, control, keep, maintain)
11
prolong(verb, support, control, advance, keep)
10
uphold(verb, support, hold, help, advance)
8
conserve(verb, support, control, keep, maintain)
8
persevere(verb, control, advance, keep, maintain)
8
persist(verb, advance, maintain, continue, stay)
7
go on(verb, expression, phrasal verb, advance, maintain)
7
keep on(verb, expression, advance, maintain, continue)
6
endure(verb, take, advance, maintain, continue)
6
extend(verb, advance, maintain, continue, stay)
6
shoulder(verb, support, hold, maintain, continue)
6
stay(verb, hold, help, advance, maintain)
5
bear(verb, support, hold, take, keep)
5
keep at(verb, expression, advance, maintain, continue)
5
last(verb, advance, maintain, continue, stay)
4
hold(verb, help, maintain, establish, back)
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APASmart Define. (2015). keep up thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/keep_up/thesaurus/synonyms
ChicagoSmart Define. 2015. "keep up thesaurus" https://smartdefine.org/keep_up/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, keep up thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/keep_up/thesaurus/synonyms>.
MLASmart Define. "keep up thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/keep_up/thesaurus/synonyms>