1,155 entry under verb topic. ×

8
reinforce(support, hold, help, increase)
8
sanction(support, take, accept, develop)
8
shore up(expression, phrasal verb, support, hold)
8
strengthen(support, hold, help, give)
8
warrant(support, show, maintain, determine)
7
abet(support, hold, help, keep)
7
admit(support, take, accept, allow)
7
advocate(support, develop, maintain, promote)
7
assert(support, show, maintain, favor)
7
authenticate(support, show, determine, praise)
7
brave(support, take, meet, feeling)
7
buoy(support, help, set, keep)
7
carry on(expression, phrasal verb, support, hold)
7
cherish(support, hold, take, maintain)
7
encounter(support, take, meet, accept)
7
establish(support, hold, help, show)
7
feel(support, take, study, get)
7
get(follow, have, grasp, realize)
7
keep on(expression, phrasal verb, hold, advance)
7
know(support, take, get, accept)
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APASmart Define. (2015). sustain thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sustain/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustain thesaurus" https://smartdefine.org/sustain/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, sustain thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sustain/thesaurus/synonyms>.
MLASmart Define. "sustain thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/sustain/thesaurus/synonyms>