63 entries under significant topic. ×

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lavish(substantial, large)
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major-league(large, considerable)
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marked(substantial, large)
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meaningful(big, heavy, substantial, large)
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momentous(big, heavy, substantial, large)
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much(substantial, large)
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noteworthy(substantial, large)
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noticeable(substantial, large)
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principal(large, considerable)
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reasonable(substantial, large)
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renowned(substantial, large)
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solid gold(expression, substantial, large)
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something(substantial, large)
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something else(expression, substantial, large)
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steady(large, considerable)
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super-duper(substantial, large)
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superabundant(large, considerable)
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to the max(expression, idiom, substantial, large)
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tolerable(substantial, large)
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unreal(substantial, large)
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APASmart Define. (2015). hefty thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hefty/thesaurus/synonyms
ChicagoSmart Define. 2015. "hefty thesaurus" https://smartdefine.org/hefty/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, hefty thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hefty/thesaurus/synonyms>.
MLASmart Define. "hefty thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/hefty/thesaurus/synonyms>