85 entries under strengthen topic. ×

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cement
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jack up(verb, expression, support, reinforce)
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jazz up(verb, expression, support)
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make stronger
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step up(verb, expression, support)
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APASmart Define. (2015). prop up thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/prop_up/thesaurus/synonyms
ChicagoSmart Define. 2015. "prop up thesaurus" https://smartdefine.org/prop_up/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, prop up thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/prop_up/thesaurus/synonyms>.
MLASmart Define. "prop up thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/prop_up/thesaurus/synonyms>