4
answer(verb, defend)
4
bear up(verb, expression, phrasal verb, support, hold)
4
become(verb, consider, allow, bear, endure)
4
boost(verb, support, hold, help, increase)
4
buoy up(verb, expression, phrasal verb, support, maintain)
4
cater(verb, support, give, keep, present)
4
concur
4
contract(verb, experience, suffer, incur)
4
convey(verb, support, move, hold, take)
4
declare(verb, show, determine, confirm, prove)
4
defy(verb, take, meet, oppose, play)
4
deliver(verb, give, maintain, serve, nurse)
4
face(verb, take, meet, play, bear)
4
fix(verb, support, calm, show, determine)
4
follow(verb, hold, get, catch, observe)
4
furnish(verb, support, help, give, keep)
4
go(verb, accept, allow, bear, experience)
4
hang in(verb, expression, phrasal verb, advance, maintain)
4
hang in there(expression, idiom)
4
harden(verb, support, increase, keep, overcome)
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APASmart Define. (2015). sustain thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sustain/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustain thesaurus" https://smartdefine.org/sustain/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, sustain thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sustain/thesaurus/synonyms>.
MLASmart Define. "sustain thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/sustain/thesaurus/synonyms>