223 entries under back topic. ×

12
nurse(verb, support, give, keep, love)
11
befriend(verb, support, help, keep, develop)
11
justify(verb, support, hold, help, show)
11
prop(verb, support, hold, calm, help)
10
assist(verb, support, hold, help, increase)
10
brace(verb, support, hold, calm, take)
10
buttress(noun, verb, support, hold, calm)
10
encourage(verb, support, help, give, increase)
10
guard(verb, support, hold, fix, keep)
10
help(verb, support, hold, keep, maintain)
10
save(verb, support, hold, keep, maintain)
8
back up(verb, expression, phrasal verb, support, increase)
8
certify(verb, support, show, determine, favor)
8
favor(verb, support, help, give, keep)
8
fortify(verb, support, hold, increase, develop)
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)
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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>