106 entries under substantial topic. ×

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dynamite(significant, large, remarkable, conspicuous)
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fab(significant, large)
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fat(significant, large)
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good-sized(significant, definite, considerable)
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goodly(significant, definite, large, considerable)
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grave(big, significant, valuable, vital)
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healthy(significant, definite, considerable)
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hefty(significant, large)
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huge(significant, large)
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large-scale(significant, large)
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lavish(significant, large)
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measurable(significant, definite, considerable)
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mondo(significant, large)
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much(significant, large)
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plentiful(significant, large)
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reasonable(plain, significant, large, obvious)
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respectable(significant, large)
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sensible(significant, definite, obvious, visible)
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sizeable(significant, large)
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solid gold(expression, significant, large)
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APASmart Define. (2015). marked thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/marked/thesaurus/synonyms
ChicagoSmart Define. 2015. "marked thesaurus" https://smartdefine.org/marked/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, marked thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/marked/thesaurus/synonyms>.
MLASmart Define. "marked thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/marked/thesaurus/synonyms>