2
run(retreat, recoil, recede)
2
share in(expression, help, play, agree, aid)
2
shore(verb, support, improve, strengthen, bolster)
2
shore up(verb, expression, support, increase, maintain)
2
show
2
show willingness(expression, help, play, agree, aid)
2
sit in(expression, change, play, follow, aid)
2
speak for(expression, support, guarantee)
2
spin
2
stand in(expression, change, cover, follow, alter)
2
stand in lieu of(expression, idiom, change, follow, alter)
2
stand up for(verb, expression, idiom, support, help)
2
stick by(verb, expression, support, help, maintain)
2
stick together(expression, help, play, agree, aid)
2
sub(noun, verb, change, cover, follow)
2
subscribe(verify, substantiate, corroborate)
2
subside
2
subsidize(verb, support, develop, promote, favor)
2
substitute(noun, verb, adjective, support, change)
2
substitute for
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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>