12
support(verb, adjective, help, increase, develop)
9
back(noun, verb, support, upset, part)
8
confirm(verb, support, maintain, promote, praise)
8
fortify(verb, support, increase, develop, promote)
7
back off(verb, expression, retreat, recoil, recede)
7
brace(verb, support, develop, maintain, promote)
7
uphold(verb, support, help, develop, maintain)
6
back down(verb, expression, retreat, recoil, recede)
6
buttress(verb, support, increase, maintain, promote)
6
foul
6
second(verb, adjective, support, help, develop)
5
advance(verb, support, help, develop, promote)
5
authenticate(verb, support, praise, favor, back)
5
bear out(verb, expression, support, help, encourage)
5
certify(verb, support, praise, approve, confirm)
5
champion(verb, support, help, advance, maintain)
5
consolidate(verb, encourage, restore, uphold, ready)
5
corroborate(verb, support, verify, substantiate, validate)
5
endorse(verb, support, help, develop, maintain)
5
prop(verb, support, increase, maintain, promote)
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APASmart Define. (2015). back up thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/back_up/thesaurus/synonyms
ChicagoSmart Define. 2015. "back up thesaurus" https://smartdefine.org/back_up/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, back up thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/back_up/thesaurus/synonyms>.
MLASmart Define. "back up thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/back_up/thesaurus/synonyms>