162 entries under substantial topic. ×

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evident(significant, definite, considerable)
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grave(big, significant, valuable, vital)
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manifest(significant, definite, considerable)
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much(significant, quite, fairly, moderately)
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no end in sight(expression, adjective, idiom, heavy)
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noteworthy
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observable(significant, definite, considerable)
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palpable(significant, considerable)
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perceivable(significant, definite, considerable)
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perceptible(significant, considerable)
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plain(significant, definite, considerable)
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plenty(great, generous, abundant, sufficient)
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pronounced(significant, definite, considerable)
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reasonable
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recognizable(significant, definite, considerable)
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solid gold(expression, significant)
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stinking with(expression, adjective, heavy, rich)
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tangible(significant, definite, considerable)
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unreal(outstanding, significant, impressive, imposing)
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venerable
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APASmart Define. (2016). large thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/large/thesaurus/synonyms
ChicagoSmart Define. 2016. "large thesaurus" https://smartdefine.org/large/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, large thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/large/thesaurus/synonyms>.
MLASmart Define. "large thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/large/thesaurus/synonyms>