5
toughen(verb, support, close, set, fix)
4
beef up(verb, expression, phrasal verb, support, increase)
4
cushion(verb, support, help, boost, sustain)
4
encourage(verb, support, maintain, promote, back)
4
fulcrum(noun, hold, block, back, base)
4
invigorate(verb, support, increase, establish, extend)
4
keep up(verb, expression, phrasal verb, support, hold)
4
maintain(verb, support, calm, help, set)
4
pier(noun, support, post, brace, prop)
4
steel(verb, support, close, set, fix)
4
supporter(noun, support, prop, backbone, bulwark)
4
truss(noun, verb, support, set, stay)
4
upright(support, post, pillar, dock, monument)
3
advocate(verb, support, maintain, promote, encourage)
3
affirm
3
aid(noun, verb, support, help, keep)
3
backbone(support, prop, pillar, bulwark)
3
beam
3
boost(verb, support, help, increase, maintain)
3
build up(verb, expression, phrasal verb, support, increase)
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APASmart Define. (2015). buttress thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/buttress/thesaurus/synonyms
ChicagoSmart Define. 2015. "buttress thesaurus" https://smartdefine.org/buttress/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, buttress thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/buttress/thesaurus/synonyms>.
MLASmart Define. "buttress thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/buttress/thesaurus/synonyms>