79 entries under big topic. ×

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burdensome(heavy, awkward, substantial, large)
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consequential(heavy, significant, substantial, large)
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critical(heavy, substantial)
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crucial(heavy, substantial)
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grave(heavy, substantial)
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life and death(expression, idiom, heavy, substantial)
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material(heavy, significant, substantial, large)
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meaningful(heavy, significant, substantial, large)
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momentous(heavy, significant, substantial, large)
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no-nonsense(heavy, substantial)
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portentous(heavy, substantial)
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sedate(heavy, substantial)
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serious(heavy, significant, substantial, large)
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severe(heavy, substantial)
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significant(heavy, substantial, large, considerable)
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solemn(heavy, substantial)
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somber(heavy, substantial)
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staid(heavy, substantial)
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underlined(heavy, substantial)
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APASmart Define. (2016). stout thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stout/thesaurus/synonyms
ChicagoSmart Define. 2016. "stout thesaurus" https://smartdefine.org/stout/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, stout thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stout/thesaurus/synonyms>.
MLASmart Define. "stout thesaurus" 2 March 2016. Web. 26 September 2026. <https://smartdefine.org/stout/thesaurus/synonyms>