575 entries under adjective topic. ×

9
bigwig(importance, valuable, main, notable)
9
earnest(importance, big, heavy, enthusiastic)
9
fateful(importance, valuable, main, notable)
9
objective(body, solid, physical, material)
9
plentiful(give, great, big, important)
9
relevant(importance, big, significant, large)
9
significative(importance, valuable, main, notable)
9
visible(material, significant, definite, real)
9
voluminous(give, great, big, heavy)
8
dependable(strong, tough, firm, solid)
8
enormous(great, big, awkward, huge)
8
genuine(good, sound, right, reasonable)
8
healthy(strong, complete, tough, fit)
8
lusty(strong, fit, solid, determined)
8
major(good, great, reasonable, fair)
8
notable(importance, main, extremely significant)
8
opulent(easy, rich, thriving, successful)
8
potent(good, strong, sound, right)
8
principal(big, important, significant, large)
8
prosperous(characteristic, calm, quiet, quality)
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APASmart Define. (2016). substantial thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>