Synonyms|108Antonyms|13|Broader|5Narrower|0Related|30
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buoy(verb, maintain, reinforce, buttress)
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defend
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encourage
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endorse
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endure
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enforce
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promote
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shoring up(expression, hold, base)
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APASmart Define. (2015). undergird thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undergird/thesaurus/synonyms
ChicagoSmart Define. 2015. "undergird thesaurus" https://smartdefine.org/undergird/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undergird thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undergird/thesaurus/synonyms>.
MLASmart Define. "undergird thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/undergird/thesaurus/synonyms>