8
reinforce(verb, support, hold, help, increase)
8
sanction(verb, support, take, accept, develop)
8
shore up(verb, expression, phrasal verb, support, hold)
8
strengthen(verb, support, hold, help, give)
8
warrant(verb, support, show, maintain, determine)
7
abet(verb, support, hold, help, keep)
7
admit(verb, support, take, accept, allow)
7
advocate(verb, support, develop, maintain, promote)
7
assert(verb, support, show, maintain, favor)
7
authenticate(verb, support, show, determine, praise)
7
brave(verb, support, take, meet, feeling)
7
buoy(verb, support, help, set, keep)
7
carry on(verb, expression, phrasal verb, support, hold)
7
cherish(verb, support, hold, take, maintain)
7
encounter(verb, support, take, meet, accept)
7
establish(verb, support, hold, help, show)
7
feel(verb, support, take, study, get)
7
get(verb, follow, have, grasp, realize)
7
keep on(verb, expression, phrasal verb, hold, advance)
7
know(verb, support, take, get, accept)
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APASmart Define. (2015). sustain thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sustain/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustain thesaurus" https://smartdefine.org/sustain/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sustain thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sustain/thesaurus/synonyms>.
MLASmart Define. "sustain thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/sustain/thesaurus/synonyms>