120 entries under substantial topic. ×

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big deal(expression, big, heavy)
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burdensome(big, heavy, awkward, large)
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consequential(big, heavy, significant, large)
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critical(big, heavy)
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crucial(big, heavy)
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grave(big, heavy)
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life and death(expression, idiom, big, heavy)
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material(big, heavy, significant, large)
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meaningful(big, heavy, significant, large)
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momentous(big, heavy, significant, large)
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no-nonsense(big, heavy)
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portentous(big, heavy)
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sedate(big, heavy)
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serious(big, heavy, significant, large)
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severe(big, heavy)
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significant(big, heavy, large, considerable)
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solemn(big, heavy)
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somber(big, heavy)
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staid(big, heavy)
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underlined(big, heavy)
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APASmart Define. (2016). stout thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/stout/thesaurus/synonyms
ChicagoSmart Define. 2016. "stout thesaurus" https://smartdefine.org/stout/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, stout thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/stout/thesaurus/synonyms>.
MLASmart Define. "stout thesaurus" 2 March 2016. Web. 27 September 2026. <https://smartdefine.org/stout/thesaurus/synonyms>