11
comfortable(adjective, calm, quiet, light, smooth)
11
constitutive(adjective, importance, valuable, main, notable)
11
grave(adjective, importance, valuable, main, notable)
11
huge(adjective, great, big, heavy, important)
11
tough(adjective, calm, strong, hard, solid)
11
valuable(adjective, great, big, important, significant)
10
appreciable(adjective, reasonable, significant, large, adequate)
10
big-league(adjective, importance, valuable, main, notable)
10
bodily(adjective, physical, material, human, actual)
10
gargantuan
10
heavy(adjective, give, strong, hard, great)
10
historic(adjective, importance, important, main, extremely significant)
10
outstanding(adjective, importance, valuable, main, notable)
10
palpable(adjective, physical, material, significant, considerable)
10
portentous(adjective, importance, valuable, main, notable)
10
responsible(adjective, importance, valuable, main, notable)
10
satisfying(adjective, good, great, full, useful)
10
sensible(adjective, good, body, reasonable, firm)
10
true(adjective, good, sound, right, reasonable)
10
vast(adjective, great, big, important, significant)
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APASmart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>